NCBI Taxonomy: 1441046

Lomatia hirsuta (ncbi_taxid: 1441046)

found 30 associated metabolites at species taxonomy rank level.

Ancestor: Lomatia

Child Taxonomies: none taxonomy data.

Scopoletin

7-hydroxy-6-methoxy-2H-chromen-2-one

C10H8O4 (192.0422568)


Scopoletin is a hydroxycoumarin that is umbelliferone bearing a methoxy substituent at position 6. It has a role as a plant growth regulator and a plant metabolite. It is functionally related to an umbelliferone. Scopoletin is a natural product found in Ficus auriculata, Haplophyllum cappadocicum, and other organisms with data available. Scopoletin is a coumarin compound found in several plants including those in the genus Scopolia and the genus Brunfelsia, as well as chicory (Cichorium), redstem wormwood (Artemisia scoparia), stinging nettle (Urtica dioica), passion flower (Passiflora), noni (Morinda citrifolia fruit) and European black nightshade (Solanum nigrum) that is comprised of umbelliferone with a methoxy group substituent at position 6. Scopoletin is used to standardize and establish pharmacokinetic properties for products derived from the plants that produce it, such as noni extract. Although the mechanism(s) of action have not yet been established, this agent has potential antineoplastic, antidopaminergic, antioxidant, anti-inflammatory and anticholinesterase effects. Plant growth factor derived from the root of Scopolia carniolica or Scopolia japonica. See also: Arnica montana Flower (part of); Lycium barbarum fruit (part of); Viburnum opulus root (part of). Isolated from Angelica acutiloba (Dong Dang Gui). Scopoletin is found in many foods, some of which are lambsquarters, lemon, sunflower, and sherry. Scopoletin is found in anise. Scopoletin is isolated from Angelica acutiloba (Dong Dang Gui A hydroxycoumarin that is umbelliferone bearing a methoxy substituent at position 6. Acquisition and generation of the data is financially supported in part by CREST/JST. [Raw Data] CBA72_Scopoletin_pos_20eV.txt [Raw Data] CBA72_Scopoletin_pos_40eV.txt [Raw Data] CBA72_Scopoletin_neg_30eV.txt [Raw Data] CBA72_Scopoletin_neg_50eV.txt [Raw Data] CBA72_Scopoletin_pos_50eV.txt [Raw Data] CBA72_Scopoletin_pos_10eV.txt [Raw Data] CBA72_Scopoletin_neg_40eV.txt [Raw Data] CBA72_Scopoletin_neg_10eV.txt [Raw Data] CBA72_Scopoletin_pos_30eV.txt [Raw Data] CBA72_Scopoletin_neg_20eV.txt Scopoletin. CAS Common Chemistry. CAS, a division of the American Chemical Society, n.d. https://commonchemistry.cas.org/detail?cas_rn=92-61-5 (retrieved 2024-07-12) (CAS RN: 92-61-5). Licensed under the Attribution-Noncommercial 4.0 International License (CC BY-NC 4.0). Scopoletin is an inhibitor of acetylcholinesterase (AChE). Scopoletin is an inhibitor of acetylcholinesterase (AChE).

   

Umbelliferone

7-Hydroxy-2H-1-benzopyran-2-one

C9H6O3 (162.03169259999999)


Umbelliferone is a hydroxycoumarin that is coumarin substituted by a hydroxy group ay position 7. It has a role as a fluorescent probe, a plant metabolite and a food component. Umbelliferone is a natural product found in Ficus septica, Artemisia ordosica, and other organisms with data available. See also: Chamomile (part of). Occurs widely in plants including Angelica subspecies Phytoalexin of infected sweet potato. Umbelliferone is found in many foods, some of which are macadamia nut, silver linden, quince, and capers. Umbelliferone is found in anise. Umbelliferone occurs widely in plants including Angelica species Phytoalexin of infected sweet potat A hydroxycoumarin that is coumarin substituted by a hydroxy group ay position 7. [Raw Data] CB220_Umbelliferone_pos_50eV_CB000077.txt [Raw Data] CB220_Umbelliferone_pos_40eV_CB000077.txt [Raw Data] CB220_Umbelliferone_pos_30eV_CB000077.txt [Raw Data] CB220_Umbelliferone_pos_10eV_CB000077.txt [Raw Data] CB220_Umbelliferone_pos_20eV_CB000077.txt [Raw Data] CB220_Umbelliferone_neg_40eV_000039.txt [Raw Data] CB220_Umbelliferone_neg_10eV_000039.txt [Raw Data] CB220_Umbelliferone_neg_30eV_000039.txt [Raw Data] CB220_Umbelliferone_neg_20eV_000039.txt Umbelliferone. CAS Common Chemistry. CAS, a division of the American Chemical Society, n.d. https://commonchemistry.cas.org/detail?cas_rn=93-35-6 (retrieved 2024-07-12) (CAS RN: 93-35-6). Licensed under the Attribution-Noncommercial 4.0 International License (CC BY-NC 4.0). Umbelliferone (7-Hydroxycoumarin), a natural product of the coumarin family, is a fluorescing compound which can be used as a sunscreen agent. Umbelliferone (7-Hydroxycoumarin), a natural product of the coumarin family, is a fluorescing compound which can be used as a sunscreen agent.

   

Quercetin

2-(3,4-dihydroxyphenyl)-3,5,7-trihydroxy-4H-chromen-4-one

C15H10O7 (302.042651)


Quercetin appears as yellow needles or yellow powder. Converts to anhydrous form at 203-207 °F. Alcoholic solutions taste very bitter. (NTP, 1992) Quercetin is a pentahydroxyflavone having the five hydroxy groups placed at the 3-, 3-, 4-, 5- and 7-positions. It is one of the most abundant flavonoids in edible vegetables, fruit and wine. It has a role as an antibacterial agent, an antioxidant, a protein kinase inhibitor, an antineoplastic agent, an EC 1.10.99.2 [ribosyldihydronicotinamide dehydrogenase (quinone)] inhibitor, a plant metabolite, a phytoestrogen, a radical scavenger, a chelator, an Aurora kinase inhibitor and a geroprotector. It is a pentahydroxyflavone and a 7-hydroxyflavonol. It is a conjugate acid of a quercetin-7-olate. Quercetin is a flavonol widely distributed in plants. It is an antioxidant, like many other phenolic heterocyclic compounds. Glycosylated forms include RUTIN and quercetrin. Quercetin is a metabolite found in or produced by Escherichia coli (strain K12, MG1655). Quercetin is a flavonoid found in many foods and herbs and is a regular component of a normal diet. Extracts of quercetin have been used to treat or prevent diverse conditions including cardiovascular disease, hypercholesterolemia, rheumatic diseases, infections and cancer but have not been shown to be effective in clinical trials for any medical condition. Quercetin as a nutritional supplement is well tolerated and has not been linked to serum enzyme elevations or to episodes of clinically apparent liver injury. Quercetin is a natural product found in Lotus ucrainicus, Visnea mocanera, and other organisms with data available. Quercetin is a polyphenolic flavonoid with potential chemopreventive activity. Quercetin, ubiquitous in plant food sources and a major bioflavonoid in the human diet, may produce antiproliferative effects resulting from the modulation of either EGFR or estrogen-receptor mediated signal transduction pathways. Although the mechanism of action of action is not fully known, the following effects have been described with this agent in vitro: decreased expression of mutant p53 protein and p21-ras oncogene, induction of cell cycle arrest at the G1 phase and inhibition of heat shock protein synthesis. This compound also demonstrates synergy and reversal of the multidrug resistance phenotype, when combined with chemotherapeutic drugs, in vitro. Quercetin also produces anti-inflammatory and anti-allergy effects mediated through the inhibition of the lipoxygenase and cyclooxygenase pathways, thereby preventing the production of pro-inflammatory mediators. Quercetin is a flavonoid widely distributed in many plants and fruits including red grapes, citrus fruit, tomato, broccoli and other leafy green vegetables, and a number of berries, including raspberries and cranberries. Quercetin itself (aglycone quercetin), as opposed to quercetin glycosides, is not a normal dietary component. Quercitin glycosides are converted to phenolic acids as they pass through the gastrointestinal tract. Quercetin has neither been confirmed scientifically as a specific therapeutic for any condition nor been approved by any regulatory agency. The U.S. Food and Drug Administration has not approved any health claims for quercetin. Nevertheless, the interest in dietary flavonoids has grown after the publication of several epidemiological studies showing an inverse correlation between dietary consumption of flavonols and flavones and reduced incidence and mortality from cardiovascular disease and cancer. In recent years, a large amount of experimental and some clinical data have accumulated regarding the effects of flavonoids on the endothelium under physiological and pathological conditions. The meta-analysis of seven prospective cohort studies concluded that the individuals in the top third of dietary flavonol intake are associated with a reduced risk of mortality from coronary heart disease as compared with those in the bottom third, after adju... Quercetin is a flavonoid widely distributed in many plants and fruits including red grapes, citrus fruit, tomato, broccoli and other leafy green vegetables, and a number of berries, including raspberries and cranberries. Quercetin itself (aglycone quercetin), as opposed to quercetin glycosides, is not a normal dietary component. Quercetin glycosides are converted to phenolic acids as they pass through the gastrointestinal tract. Quercetin has neither been confirmed scientifically as a specific therapeutic for any condition nor been approved by any regulatory agency. The U.S. Food and Drug Administration has not approved any health claims for quercetin. Nevertheless, the interest in dietary flavonoids has grown after the publication of several epidemiological studies showing an inverse correlation between dietary consumption of flavonols and flavones and reduced incidence and mortality from cardiovascular disease and cancer. In recent years, a large amount of experimental and some clinical data have accumulated regarding the effects of flavonoids on the endothelium under physiological and pathological conditions. The meta-analysis of seven prospective cohort studies concluded that the individuals in the top third of dietary flavonol intake are associated with a reduced risk of mortality from coronary heart disease as compared with those in the bottom third, after adjustment for known risk factors and other dietary components. A limited number of intervention studies with flavonoids and flavonoid containing foods and extracts has been performed in several pathological conditions (PMID:17015250). Quercetin is isolated from many plants, especially fruits, such as Helichrysum, Euphorbia and Karwinskia spp. Present in the Solanaceae, Rhamnaceae, Passifloraceae and many other families. For example detected in almost all studied Umbelliferae. Nutriceutical with antiinflammatory props. and a positive influence on the blood lipid profile. Found in a wide variety of foods especially apples, bee pollen, blackcurrants, capers, cocoa, cranberries, dock leaves, elderberries, fennel, lovage, red onions, ancho peppers, dill weed and tarragon. A pentahydroxyflavone having the five hydroxy groups placed at the 3-, 3-, 4-, 5- and 7-positions. It is one of the most abundant flavonoids in edible vegetables, fruit and wine. COVID info from clinicaltrial, clinicaltrials, clinical trial, clinical trials D020011 - Protective Agents > D000975 - Antioxidants Corona-virus Coronavirus SARS-CoV-2 COVID-19 SARS-CoV COVID19 SARS2 SARS CONFIDENCE standard compound; INTERNAL_ID 298; DATASET 20200303_ENTACT_RP_MIX505; DATA_PROCESSING MERGING RMBmix ver. 0.2.7; DATA_PROCESSING PRESCREENING Shinyscreen ver. 0.8.0; ORIGINAL_ACQUISITION_NO 4014; ORIGINAL_PRECURSOR_SCAN_NO 4012 INTERNAL_ID 298; CONFIDENCE standard compound; DATASET 20200303_ENTACT_RP_MIX505; DATA_PROCESSING MERGING RMBmix ver. 0.2.7; DATA_PROCESSING PRESCREENING Shinyscreen ver. 0.8.0; ORIGINAL_ACQUISITION_NO 4011; ORIGINAL_PRECURSOR_SCAN_NO 4010 CONFIDENCE standard compound; INTERNAL_ID 298; DATASET 20200303_ENTACT_RP_MIX505; DATA_PROCESSING MERGING RMBmix ver. 0.2.7; DATA_PROCESSING PRESCREENING Shinyscreen ver. 0.8.0; ORIGINAL_ACQUISITION_NO 4019; ORIGINAL_PRECURSOR_SCAN_NO 4018 CONFIDENCE standard compound; INTERNAL_ID 298; DATASET 20200303_ENTACT_RP_MIX505; DATA_PROCESSING MERGING RMBmix ver. 0.2.7; DATA_PROCESSING PRESCREENING Shinyscreen ver. 0.8.0; ORIGINAL_ACQUISITION_NO 4017; ORIGINAL_PRECURSOR_SCAN_NO 4016 CONFIDENCE standard compound; INTERNAL_ID 298; DATASET 20200303_ENTACT_RP_MIX505; DATA_PROCESSING MERGING RMBmix ver. 0.2.7; DATA_PROCESSING PRESCREENING Shinyscreen ver. 0.8.0; ORIGINAL_ACQUISITION_NO 4011; ORIGINAL_PRECURSOR_SCAN_NO 4010 CONFIDENCE standard compound; INTERNAL_ID 298; DATASET 20200303_ENTACT_RP_MIX505; DATA_PROCESSING MERGING RMBmix ver. 0.2.7; DATA_PROCESSING PRESCREENING Shinyscreen ver. 0.8.0; ORIGINAL_ACQUISITION_NO 4096; ORIGINAL_PRECURSOR_SCAN_NO 4094 CONFIDENCE standard compound; INTERNAL_ID 298; DATASET 20200303_ENTACT_RP_MIX505; DATA_PROCESSING MERGING RMBmix ver. 0.2.7; DATA_PROCESSING PRESCREENING Shinyscreen ver. 0.8.0; ORIGINAL_ACQUISITION_NO 4024; ORIGINAL_PRECURSOR_SCAN_NO 4023 Acquisition and generation of the data is financially supported in part by CREST/JST. [Raw Data] CB109_Quercetin_pos_30eV_CB000041.txt IPB_RECORD: 1761; CONFIDENCE confident structure [Raw Data] CB109_Quercetin_pos_10eV_CB000041.txt [Raw Data] CB109_Quercetin_pos_20eV_CB000041.txt [Raw Data] CB109_Quercetin_pos_40eV_CB000041.txt [Raw Data] CB109_Quercetin_pos_50eV_CB000041.txt IPB_RECORD: 161; CONFIDENCE confident structure [Raw Data] CB109_Quercetin_neg_40eV_000027.txt [Raw Data] CB109_Quercetin_neg_50eV_000027.txt [Raw Data] CB109_Quercetin_neg_20eV_000027.txt [Raw Data] CB109_Quercetin_neg_30eV_000027.txt [Raw Data] CB109_Quercetin_neg_10eV_000027.txt CONFIDENCE standard compound; INTERNAL_ID 124 CONFIDENCE standard compound; ML_ID 54 Quercetin, a natural flavonoid, is a stimulator of recombinant SIRT1 and also a PI3K inhibitor with IC50 of 2.4 μM, 3.0 μM and 5.4 μM for PI3K γ, PI3K δ and PI3K β, respectively[1]. Quercetin, a natural flavonoid, is a stimulator of recombinant SIRT1 and also a PI3K inhibitor with IC50 of 2.4 μM, 3.0 μM and 5.4 μM for PI3K γ, PI3K δ and PI3K β, respectively[1].

   

Isorhamnetin

4H-1-Benzopyran-4-one, 3,5,7-trihydroxy-2-(4-hydroxy-3-methoxyphenyl)-

C16H12O7 (316.05830019999996)


Isorhamnetin is the methylated metabolite of quercetin. Quercetin is an important dietary flavonoid with in vitro antioxidant activity. However, it is found in human plasma as conjugates with glucuronic acid, sulfate or methyl groups, with no significant amounts of free quercetin present. Isorhamnetin prevents endothelial cell injuries from oxidized LDL via inhibition of lectin-like ox-LDL receptor-1 upregulation, interference of ox-LDL-mediated intracellular signaling pathway (p38MAPK activation, NF-kappaB nuclear translocation, eNOS expression) and the antioxidant activity of isorhamnetin. Isorhamnetin prevents endothelial dysfunction, superoxide production, and overexpression of p47phox induced by angiotensin II. Isorhamnetin appears to be a potent drug against esophageal cancer due to its in vitro potential to not only inhibit proliferation but also induce apoptosis of Eca-109 cells. (PMID: 15493462, 17368593, 17374653, 16963021). Isorhamnetin is a monomethoxyflavone that is quercetin in which the hydroxy group at position 3 is replaced by a methoxy group. It has a role as an EC 1.14.18.1 (tyrosinase) inhibitor, an anticoagulant and a metabolite. It is a 7-hydroxyflavonol, a tetrahydroxyflavone and a monomethoxyflavone. It is functionally related to a quercetin. It is a conjugate acid of an isorhamnetin(1-). Isorhamnetin is a natural product found in Lotus ucrainicus, Strychnos pseudoquina, and other organisms with data available. Isorhamnetin is a metabolite found in or produced by Saccharomyces cerevisiae. See also: Peumus boldus leaf (part of). Widespread flavonol found especially in bee pollen, chives, corn poppy leaves, garden cress, fennel, hartwort, red onions, pears, dillweed, parsley and tarragon. Isorhamnetin is found in many foods, some of which are italian sweet red pepper, carrot, yellow wax bean, and lemon balm. A monomethoxyflavone that is quercetin in which the hydroxy group at position 3 is replaced by a methoxy group. Acquisition and generation of the data is financially supported in part by CREST/JST. Isorhamnetin is a flavonoid compound extracted from the Chinese herb Hippophae rhamnoides L.. Isorhamnetin suppresses skin cancer through direct inhibition of MEK1 and PI3K. Isorhamnetin is a flavonoid compound extracted from the Chinese herb Hippophae rhamnoides L.. Isorhamnetin suppresses skin cancer through direct inhibition of MEK1 and PI3K.

   

Rhamnetin

3 3 4 5-tetrahydroxy-7-methoxyflavone

C16H12O7 (316.05830019999996)


Acquisition and generation of the data is financially supported in part by CREST/JST. Rhamnetin is a quercetin derivative found in Coriandrum sativum, inhibits secretory phospholipase A2, with antioxidant and anti-inflammatory activity[1]. Rhamnetin is a quercetin derivative found in Coriandrum sativum, inhibits secretory phospholipase A2, with antioxidant and anti-inflammatory activity[1]. Rhamnetin is a quercetin derivative found in Coriandrum sativum, inhibits secretory phospholipase A2, with antioxidant and anti-inflammatory activity[1].

   

Quercetin

2- (3,4-Dihydroxyphenyl) -3,5,7-trihydroxy-4H-1-benzopyran-4-one

C15H10O7 (302.042651)


Annotation level-1 COVID info from clinicaltrial, clinicaltrials, clinical trial, clinical trials relative retention time with respect to 9-anthracene Carboxylic Acid is 0.898 D020011 - Protective Agents > D000975 - Antioxidants Corona-virus Coronavirus SARS-CoV-2 COVID-19 SARS-CoV COVID19 SARS2 SARS relative retention time with respect to 9-anthracene Carboxylic Acid is 0.902 Acquisition and generation of the data is financially supported by the Max-Planck-Society IPB_RECORD: 1981; CONFIDENCE confident structure IPB_RECORD: 3301; CONFIDENCE confident structure IPB_RECORD: 3283; CONFIDENCE confident structure Quercetin, a natural flavonoid, is a stimulator of recombinant SIRT1 and also a PI3K inhibitor with IC50 of 2.4 μM, 3.0 μM and 5.4 μM for PI3K γ, PI3K δ and PI3K β, respectively[1]. Quercetin, a natural flavonoid, is a stimulator of recombinant SIRT1 and also a PI3K inhibitor with IC50 of 2.4 μM, 3.0 μM and 5.4 μM for PI3K γ, PI3K δ and PI3K β, respectively[1].

   

Isorhamnetin

4H-1-Benzopyran-4-one, 3,5,7-trihydroxy-2-(3-hydroxy-4-methoxyphenyl)- (9CI)

C16H12O7 (316.05830019999996)


Glucoside present in the leaves of Peumus boldus (boldo). Isorhamnetin 3-dirhamnoside is found in fruits. Annotation level-1 Isorhamnetin is a flavonoid compound extracted from the Chinese herb Hippophae rhamnoides L.. Isorhamnetin suppresses skin cancer through direct inhibition of MEK1 and PI3K. Isorhamnetin is a flavonoid compound extracted from the Chinese herb Hippophae rhamnoides L.. Isorhamnetin suppresses skin cancer through direct inhibition of MEK1 and PI3K.

   

Rhamnetin

4H-1-Benzopyran-4-one, 2-(3,4-dihydroxyphenyl)-3,5-dihydroxy-7-methoxy- (9CI)

C16H12O7 (316.05830019999996)


Rhamnetin is a monomethoxyflavone that is quercetin methylated at position 7. It has a role as a metabolite, an antioxidant and an anti-inflammatory agent. It is a monomethoxyflavone and a tetrahydroxyflavone. It is functionally related to a quercetin. It is a conjugate acid of a rhamnetin-3-olate. Rhamnetin is a natural product found in Ageratina altissima, Ammannia auriculata, and other organisms with data available. A monomethoxyflavone that is quercetin methylated at position 7. 2-(3,4-dihydroxyphenyl)-3,5-dihydroxy-7-methoxy-4h-chromen-4-one, also known as 7-methoxyquercetin or quercetin 7-methyl ether, is a member of the class of compounds known as flavonols. Flavonols are compounds that contain a flavone (2-phenyl-1-benzopyran-4-one) backbone carrying a hydroxyl group at the 3-position. Thus, 2-(3,4-dihydroxyphenyl)-3,5-dihydroxy-7-methoxy-4h-chromen-4-one is considered to be a flavonoid lipid molecule. 2-(3,4-dihydroxyphenyl)-3,5-dihydroxy-7-methoxy-4h-chromen-4-one is practically insoluble (in water) and a very weakly acidic compound (based on its pKa). 2-(3,4-dihydroxyphenyl)-3,5-dihydroxy-7-methoxy-4h-chromen-4-one can be found in a number of food items such as tea, apple, sweet orange, and parsley, which makes 2-(3,4-dihydroxyphenyl)-3,5-dihydroxy-7-methoxy-4h-chromen-4-one a potential biomarker for the consumption of these food products. Rhamnetin is a quercetin derivative found in Coriandrum sativum, inhibits secretory phospholipase A2, with antioxidant and anti-inflammatory activity[1]. Rhamnetin is a quercetin derivative found in Coriandrum sativum, inhibits secretory phospholipase A2, with antioxidant and anti-inflammatory activity[1]. Rhamnetin is a quercetin derivative found in Coriandrum sativum, inhibits secretory phospholipase A2, with antioxidant and anti-inflammatory activity[1].

   

Scopoletin

Scopoletin

C10H8O4 (192.0422568)


relative retention time with respect to 9-anthracene Carboxylic Acid is 0.636 relative retention time with respect to 9-anthracene Carboxylic Acid is 0.637 relative retention time with respect to 9-anthracene Carboxylic Acid is 0.629 relative retention time with respect to 9-anthracene Carboxylic Acid is 0.631 IPB_RECORD: 1582; CONFIDENCE confident structure Scopoletin is an inhibitor of acetylcholinesterase (AChE). Scopoletin is an inhibitor of acetylcholinesterase (AChE).

   

Scopoletol

2H-1-Benzopyran-2-one, 7-hydroxy-6-methoxy- (9CI)

C10H8O4 (192.0422568)


Scopoletin is an inhibitor of acetylcholinesterase (AChE). Scopoletin is an inhibitor of acetylcholinesterase (AChE).

   

Quertin

4H-1-Benzopyran-4-one, 2-(3,4-dihydroxyphenyl)-3,5,7-trihydroxy-

C15H10O7 (302.042651)


COVID info from clinicaltrial, clinicaltrials, clinical trial, clinical trials D020011 - Protective Agents > D000975 - Antioxidants Corona-virus Coronavirus SARS-CoV-2 COVID-19 SARS-CoV COVID19 SARS2 SARS Quercetin, a natural flavonoid, is a stimulator of recombinant SIRT1 and also a PI3K inhibitor with IC50 of 2.4 μM, 3.0 μM and 5.4 μM for PI3K γ, PI3K δ and PI3K β, respectively[1]. Quercetin, a natural flavonoid, is a stimulator of recombinant SIRT1 and also a PI3K inhibitor with IC50 of 2.4 μM, 3.0 μM and 5.4 μM for PI3K γ, PI3K δ and PI3K β, respectively[1].

   

Skimmetin

InChI=1\C9H6O3\c10-7-3-1-6-2-4-9(11)12-8(6)5-7\h1-5,10

C9H6O3 (162.03169259999999)


COVID info from PDB, Protein Data Bank Corona-virus Coronavirus SARS-CoV-2 COVID-19 SARS-CoV COVID19 SARS2 SARS Umbelliferone (7-Hydroxycoumarin), a natural product of the coumarin family, is a fluorescing compound which can be used as a sunscreen agent. Umbelliferone (7-Hydroxycoumarin), a natural product of the coumarin family, is a fluorescing compound which can be used as a sunscreen agent.