Exact Mass: 678.3016276

Exact Mass Matches: 678.3016276

Found 110 metabolites which its exact mass value is equals to given mass value 678.3016276, within given mass tolerance error 0.05 dalton. Try search metabolite list with more accurate mass tolerance error 0.01 dalton.

Hv-NCC-1

3-(5-{[4-(1,2-dihydroxyethyl)-3-methyl-5-oxo-2,5-dihydro-1H-pyrrol-2-yl]methyl}-2-(2-{[5-formyl-3-(2-hydroxyethyl)-4-methyl-1H-pyrrol-2-yl]methyl}-5-(methoxycarbonyl)-3-methyl-4-oxo-1H,4H,5H,6H-cyclopenta[b]pyrrol-6-yl)-4-methyl-1H-pyrrol-3-yl)propanoic acid

C35H42N4O10 (678.2900792)


So-NCC-2 is found in brassicas. So-NCC-2 is isolated from spinach. Isolated from spinach. So-NCC-2 is found in brassicas.

   

Galnon

9H-fluoren-9-ylmethyl N-[1-[[6-amino-1-[(4-methyl-2-oxochromen-7-yl)amino]-1-oxohexan-2-yl]amino]-3-cyclohexyl-1-oxopropan-2-yl]carbamate

C40H46N4O6 (678.3417176)


   
   
   

Triptofordin D 2

[3R-(3alpha,4alpha,5alpha,5aalpha,6alpha,9beta,9aalpha,10R*)]-4,10-bis(Acetyloxy)-5a-[(acetyloxy)methyl]-5-(benzoyloxy)octahydro-9-hydroxy-2,2,9-trimethyl-2H-3,9a-methano-1-benzoxepin-6-yl ester 3-phenyl-2-propenoic acid

C37H42O12 (678.2676132)


   

1-(2-methylpropanoyl)-3-acetyl-11-methoxymeliacarpinin

(-)-1-(2-methylpropanoyl)-3-acetyl-11-methoxymeliacarpinin

C34H46O14 (678.2887416)


   
   

Wanepimedoside A

3-[[6-Deoxy-2-O-(6-deoxy-alpha-L-mannopyranosyl)-alpha-L-mannopyranosyl]oxy]-5,7-dihydroxy-8-(3-hydroxy-3-methylbutyl)-2-(4-methoxyphenyl)-4H-1-benzopyran-4-one

C33H42O15 (678.2523582)


   
   
   

S4:20(P3:18/F1:2)

S4:20(P3:18/F1:2)

C32H54O15 (678.3462534)


Annotation level-3

   

6-O-Acetyl-2,3,4-tri-O-(3S-methylpentanoyl)-alpha-D-glucopyranosyl-beta-D-fructofuranoside|6-O-acetyl-2,3,4-tri-O-<(S)-3-methylpentanoyl>sucrose|6-O-acetyl-2,3,4-tri-O-<3S-methylpentanoyl>-sucrose

6-O-Acetyl-2,3,4-tri-O-(3S-methylpentanoyl)-alpha-D-glucopyranosyl-beta-D-fructofuranoside|6-O-acetyl-2,3,4-tri-O-<(S)-3-methylpentanoyl>sucrose|6-O-acetyl-2,3,4-tri-O-<3S-methylpentanoyl>-sucrose

C32H54O15 (678.3462534)


   

19-hydroxy-3-epi-ervafolidine|19S-Hydroxy-3-epiervafoline

19-hydroxy-3-epi-ervafolidine|19S-Hydroxy-3-epiervafoline

C40H46N4O6 (678.3417176)


   

4-acetoxy-1beta-(2-methylbutyryloxy)-8,10-epoxyabrotanifolone

4-acetoxy-1beta-(2-methylbutyryloxy)-8,10-epoxyabrotanifolone

C35H50O13 (678.3251250000001)


   

crocetin monogentibiosyl ester

crocetin monogentibiosyl ester

C34H46O14 (678.2887416)


   

1alpha,6beta-diacetoxy-2alpha,9beta-dibenzoyloxy-15-isobutanoyloxy-beta-dihydroagarofuran|fokienagarofuran C

1alpha,6beta-diacetoxy-2alpha,9beta-dibenzoyloxy-15-isobutanoyloxy-beta-dihydroagarofuran|fokienagarofuran C

C38H46O11 (678.3039966)


   

19R-Hydroxyervafolidine

19R-Hydroxyervafolidine

C40H46N4O6 (678.3417176)


   

2,3-di-O-(5-methylheptanoyl)-1,6-di-O-acetylsucrose

2,3-di-O-(5-methylheptanoyl)-1,6-di-O-acetylsucrose

C32H54O15 (678.3462534)


   

(7R,8S)-9-O-shikimoyl-4-O-beta-D-glucopyranosyldihydrodehydrodiconiferyl alcohol

(7R,8S)-9-O-shikimoyl-4-O-beta-D-glucopyranosyldihydrodehydrodiconiferyl alcohol

C33H42O15 (678.2523582)


   

2-O-acetyl-3-O-decanoyl-3,4-di-O-isobutyrylsucrose

2-O-acetyl-3-O-decanoyl-3,4-di-O-isobutyrylsucrose

C32H54O15 (678.3462534)


   
   
   
   

2alpha,7alpha-diacetoxy-1alpha,11alpha-dibenzoyloxy-3alpha,8beta-dihydroxyisopimar-14-one|orthoarisin E

2alpha,7alpha-diacetoxy-1alpha,11alpha-dibenzoyloxy-3alpha,8beta-dihydroxyisopimar-14-one|orthoarisin E

C38H46O11 (678.3039966)


   

1alpha,2beta,8beta-triacetoxy-9beta-dibenzoyloxy-6beta-cinnamoyloxy-4beta-hydroxy-dihydro-beta-agarofuran|salaterpene B

1alpha,2beta,8beta-triacetoxy-9beta-dibenzoyloxy-6beta-cinnamoyloxy-4beta-hydroxy-dihydro-beta-agarofuran|salaterpene B

C37H42O12 (678.2676132)


   

3alpha,7alpha-diacetoxy-1alpha,11alpha-dibenzoyloxy-2alpha,8beta-dihydroxyisopimar-14-one|orthoarisin F

3alpha,7alpha-diacetoxy-1alpha,11alpha-dibenzoyloxy-2alpha,8beta-dihydroxyisopimar-14-one|orthoarisin F

C38H46O11 (678.3039966)


   

(1R,2S,3S,4S,5S,6R,7R,9S,10R)-1-benzoyloxy-9-cinnamoyloxy-2,3,6-triacetoxy-4-hydroxy-dihydro-beta-agarofuran

(1R,2S,3S,4S,5S,6R,7R,9S,10R)-1-benzoyloxy-9-cinnamoyloxy-2,3,6-triacetoxy-4-hydroxy-dihydro-beta-agarofuran

C37H42O12 (678.2676132)


   
   
   

sulfangolid D ammonium salt

sulfangolid D ammonium salt

C36H54O10S (678.3437504)


   

sucrose 2,6,3,4-tetraisovalerate

sucrose 2,6,3,4-tetraisovalerate

C32H54O15 (678.3462534)


   
   

8-beta-D-olivosyl-4-1-beta-D-olivosyl-3-1-alpha-L-rhodinosyltetrangulol|landomycin P

8-beta-D-olivosyl-4-1-beta-D-olivosyl-3-1-alpha-L-rhodinosyltetrangulol|landomycin P

C37H42O12 (678.2676132)


   
   
   

10-beta-D-Glucosyloxyvincoside lactam

10-beta-D-Glucosyloxyvincoside lactam

C32H42N2O14 (678.2635912000001)


   
   

sucrose ester MW 678

sucrose ester MW 678

C32H54O15 (678.3462534)


   
   
   

2,4,1-tri-O-(3-methylbutyryl)-3-O-(2-methylbutyryl)-sucrose

2,4,1-tri-O-(3-methylbutyryl)-3-O-(2-methylbutyryl)-sucrose

C32H54O15 (678.3462534)


   

11-hydroxyazadirachtin-B|3-tigloyl-azadirachtol|azadirachtin B

11-hydroxyazadirachtin-B|3-tigloyl-azadirachtol|azadirachtin B

C33H42O15 (678.2523582)


   
   
   

3-(2-methylbutanoyl)-1,3,4-tri(isovaleryl)sucrose

3-(2-methylbutanoyl)-1,3,4-tri(isovaleryl)sucrose

C32H54O15 (678.3462534)


   

C33H38N6O10_15-(2-Amino-2-oxoethyl)-10,11,23-trihydroxy-18-[(3-methyl-2-oxopentanoyl)amino]-9,14,17-trioxo-N-[(1Z)-1-propen-1-yl]-8,13,16-triazatetracyclo[18.3.1.0~2,7~.0~6,10~]tetracosa-1(24),2,4,6,20,22-hexaene-12-carboxamide

NCGC00380296-01_C33H38N6O10_15-(2-Amino-2-oxoethyl)-10,11,23-trihydroxy-18-[(3-methyl-2-oxopentanoyl)amino]-9,14,17-trioxo-N-[(1Z)-1-propen-1-yl]-8,13,16-triazatetracyclo[18.3.1.0~2,7~.0~6,10~]tetracosa-1(24),2,4,6,20,22-hexaene-12-carboxamide

C33H38N6O10 (678.2649288)


   

C32H54O15_1,3,4,6-Tetrakis-O-(3-methylbutanoyl)-beta-D-fructofuranosyl alpha-D-glucopyranoside

NCGC00385146-01_C32H54O15_1,3,4,6-Tetrakis-O-(3-methylbutanoyl)-beta-D-fructofuranosyl alpha-D-glucopyranoside

C32H54O15 (678.3462534)


   

C32H54O15_1,3,6-Tris-O-(3-methylbutanoyl)-beta-D-fructofuranosyl 2-O-(3-methylbutanoyl)-alpha-D-glucopyranoside

NCGC00385500-01_C32H54O15_1,3,6-Tris-O-(3-methylbutanoyl)-beta-D-fructofuranosyl 2-O-(3-methylbutanoyl)-alpha-D-glucopyranoside

C32H54O15 (678.3462534)


   

C34H46O14_Propanoic acid, 2-methyl-, (2R,3R,3aS,4R,6S,7R,10E,12R,13aR)-2,3,4,6,13a-pentakis(acetyloxy)-2,3,3a,4,5,6,7,8,9,12,13,13a-dodecahydro-2,9,9,12-tetramethyl-5-methylene-8,13-dioxo-1H-cyclopentacyclododecen-7-yl ester

NCGC00380508-01_C34H46O14_Propanoic acid, 2-methyl-, (2R,3R,3aS,4R,6S,7R,10E,12R,13aR)-2,3,4,6,13a-pentakis(acetyloxy)-2,3,3a,4,5,6,7,8,9,12,13,13a-dodecahydro-2,9,9,12-tetramethyl-5-methylene-8,13-dioxo-1H-cyclopentacyclododecen-7-yl ester

C34H46O14 (678.2887416)


   

15-(carbamoylmethyl)-10,11,23-trihydroxy-18-(3-methyl-2-oxopentanamido)-9,14,17-trioxo-N-[(1Z)-prop-1-en-1-yl]-8,13,16-triazatetracyclo[18.3.1.0²,⁷.0⁶,¹⁰]tetracosa-1(23),2(7),3,5,20(24),21-hexaene-12-carboxamide

15-(carbamoylmethyl)-10,11,23-trihydroxy-18-(3-methyl-2-oxopentanamido)-9,14,17-trioxo-N-[(1Z)-prop-1-en-1-yl]-8,13,16-triazatetracyclo[18.3.1.0²,⁷.0⁶,¹⁰]tetracosa-1(23),2(7),3,5,20(24),21-hexaene-12-carboxamide

C33H38N6O10 (678.2649288)


   

IERDF

Ile-Glu-Arg-Asp-Phe

C30H46N8O10 (678.3336736)


   

Hv-NCC-1

3-(5-{[4-(1,2-dihydroxyethyl)-3-methyl-5-oxo-2,5-dihydro-1H-pyrrol-2-yl]methyl}-2-(2-{[5-formyl-3-(2-hydroxyethyl)-4-methyl-1H-pyrrol-2-yl]methyl}-5-(methoxycarbonyl)-3-methyl-4-oxo-1H,4H,5H,6H-cyclopenta[b]pyrrol-6-yl)-4-methyl-1H-pyrrol-3-yl)propanoic acid

C35H42N4O10 (678.2900792)


   

6-O-succinyl methyl ester macrolactin O

7S-(6-O-methyl-succinyl)-beta-D-glucopyranosyl-15-oxo-13S-hydroxy-2Z,4E,8E,10Z,16E,18E,23R-tetracosahexenyl-23-olide

C35H50O13 (678.3251250000001)


   

OKODiA-PG

1-(9Z-octadecenoyl)-2-(5-oxo-7-carboxy-6E-heptenoyl)-sn-glycero-3-phospho-(1-sn-glycerol)

C32H55O13P (678.3380109999999)


   

(R)-(+)-2,2-Bis(di-p-tolylphosphino)-1,1-binaphthyl

(R)-(+)-2,2-Bis(di-p-tolylphosphino)-1,1-binaphthyl

C48H40P2 (678.2605100000001)


   

2-(2-Ethoxyphenyl)-4,5-diphenylimidazole-1,2-dimer

2-(2-Ethoxyphenyl)-4,5-diphenylimidazole-1,2-dimer

C46H38N4O2 (678.2994608)


   

9H-Fluoren-2-aMine, N-[1,1-biphenyl]-4-yl-9,9-diMethyl-N-[4-(9-phenyl-9H-carbazol-3-yl)phenyl]-

9H-Fluoren-2-aMine, N-[1,1-biphenyl]-4-yl-9,9-diMethyl-N-[4-(9-phenyl-9H-carbazol-3-yl)phenyl]-

C51H38N2 (678.3034828000001)


   

2,2-bis(di-p-tolylphosphino)-1,1-binaphthyl

2,2-bis(di-p-tolylphosphino)-1,1-binaphthyl

C48H40P2 (678.2605100000001)


   

R-(R*,S*)]-[[2-methyl-1-(1-oxopropoxy)propoxy]-(4-phenylbutyl)phosphinyl] acetic acid, (-)-cinchonidine (1:1) salt

R-(R*,S*)]-[[2-methyl-1-(1-oxopropoxy)propoxy]-(4-phenylbutyl)phosphinyl] acetic acid, (-)-cinchonidine (1:1) salt

C38H51N2O7P (678.3433706000001)


   

1-isocyanato-2-[(4-isocyanatophenyl)methyl]benzene,1-isocyanato-4-[(4-isocyanatophenyl)methyl]benzene,2-methyloxirane,oxirane,propane-1,2-diol

1-isocyanato-2-[(4-isocyanatophenyl)methyl]benzene,1-isocyanato-4-[(4-isocyanatophenyl)methyl]benzene,2-methyloxirane,oxirane,propane-1,2-diol

C38H38N4O8 (678.2689508000001)


   

N2,N7-DIPHENYL-N2,N7-DI-M-TOLYL-9,9-SPIROBI[FLUORENE]-2,7-DIAMINE

N2,N7-DIPHENYL-N2,N7-DI-M-TOLYL-9,9-SPIROBI[FLUORENE]-2,7-DIAMINE

C51H38N2 (678.3034828000001)


   
   
   

(S)-(-)-2,2-bis-(di-p-Tolylphosphino)-1,1-binaphthyl

(S)-(-)-2,2-bis-(di-p-Tolylphosphino)-1,1-binaphthyl

C48H40P2 (678.2605100000001)


   
   

meso-Tetrakis(2-N-methylpyridyl)porphine

meso-Tetrakis(2-N-methylpyridyl)porphine

C44H38N8+4 (678.3219268)


D011838 - Radiation-Sensitizing Agents > D017319 - Photosensitizing Agents D006133 - Growth Substances > D043924 - Angiogenesis Modulating Agents D000970 - Antineoplastic Agents > D020533 - Angiogenesis Inhibitors D006133 - Growth Substances > D006131 - Growth Inhibitors D000890 - Anti-Infective Agents D003879 - Dermatologic Agents D004791 - Enzyme Inhibitors

   

Atractysucrose IIIa

Atractysucrose IIIa

C32H54O15 (678.3462534)


   

Maropitant citrate

Maropitant citrate

C38H50N2O9 (678.351613)


D018373 - Peripheral Nervous System Agents > D001337 - Autonomic Agents C78272 - Agent Affecting Nervous System > C267 - Antiemetic Agent D005765 - Gastrointestinal Agents > D000932 - Antiemetics D002491 - Central Nervous System Agents

   

[6-[4-Acetyloxy-3-hydroxy-2,5-bis(hydroxymethyl)oxolan-2-yl]oxy-4,5-di(hexanoyloxy)-2-(hydroxymethyl)oxan-3-yl] hexanoate

[6-[4-Acetyloxy-3-hydroxy-2,5-bis(hydroxymethyl)oxolan-2-yl]oxy-4,5-di(hexanoyloxy)-2-(hydroxymethyl)oxan-3-yl] hexanoate

C32H54O15 (678.3462534)


   

sucrose-2,3,4-tri-(3-methyl)pentanoyl-6-O-acetate

sucrose-2,3,4-tri-(3-methyl)pentanoyl-6-O-acetate

C32H54O15 (678.3462534)


   

Sucrose-2-(2-methyl)butyryl-4-(2-methyl)butyryl-3-(4-methyl)pentanoyl-6-isobutyrate

Sucrose-2-(2-methyl)butyryl-4-(2-methyl)butyryl-3-(4-methyl)pentanoyl-6-isobutyrate

C32H54O15 (678.3462534)


   

Landomycin P

Landomycin P

C37H42O12 (678.2676132)


A natural product found in Streptomyces cyanogenus.

   

(10S,11S,12S,15S,18S)-15-(2-amino-2-oxoethyl)-10,11,23-trihydroxy-18-{[(3R)-3-methyl-2-oxopentanoyl]amino}-9,14,17-trioxo-N-[(1Z)-prop-1-en-1-yl]-8,13,16-triazatetracyclo[18.3.1.0(2,7).0(6,10)]tetracosa-1(24),2,4,6,20,22-hexaene-12-carboxamide

(10S,11S,12S,15S,18S)-15-(2-amino-2-oxoethyl)-10,11,23-trihydroxy-18-{[(3R)-3-methyl-2-oxopentanoyl]amino}-9,14,17-trioxo-N-[(1Z)-prop-1-en-1-yl]-8,13,16-triazatetracyclo[18.3.1.0(2,7).0(6,10)]tetracosa-1(24),2,4,6,20,22-hexaene-12-carboxamide

C33H38N6O10 (678.2649288)


   

(10S,11R,12S,15S,18S)-15-(2-amino-2-oxoethyl)-10,11,23-trihydroxy-18-{[(3R)-3-methyl-2-oxopentanoyl]amino}-9,14,17-trioxo-N-[(1Z)-prop-1-en-1-yl]-8,13,16-triazatetracyclo[18.3.1.0(2,7).0(6,10)]tetracosa-1(24),2,4,6,20,22-hexaene-12-carboxamide

(10S,11R,12S,15S,18S)-15-(2-amino-2-oxoethyl)-10,11,23-trihydroxy-18-{[(3R)-3-methyl-2-oxopentanoyl]amino}-9,14,17-trioxo-N-[(1Z)-prop-1-en-1-yl]-8,13,16-triazatetracyclo[18.3.1.0(2,7).0(6,10)]tetracosa-1(24),2,4,6,20,22-hexaene-12-carboxamide

C33H38N6O10 (678.2649288)


   

(10S,11S,12S,15S,18S)-15-(2-amino-2-oxoethyl)-10,11,23-trihydroxy-18-{[(3S)-3-methyl-2-oxopentanoyl]amino}-9,14,17-trioxo-N-[(1Z)-prop-1-en-1-yl]-8,13,16-triazatetracyclo[18.3.1.0(2,7).0(6,10)]tetracosa-1(24),2,4,6,20,22-hexaene-12-carboxamide

(10S,11S,12S,15S,18S)-15-(2-amino-2-oxoethyl)-10,11,23-trihydroxy-18-{[(3S)-3-methyl-2-oxopentanoyl]amino}-9,14,17-trioxo-N-[(1Z)-prop-1-en-1-yl]-8,13,16-triazatetracyclo[18.3.1.0(2,7).0(6,10)]tetracosa-1(24),2,4,6,20,22-hexaene-12-carboxamide

C33H38N6O10 (678.2649288)


   

Tmc-95A

Tmc-95A

C33H38N6O10 (678.2649288)


A 17-membered macrocyclic lactam that incorporates a phenol and a substituted indole moiety. It includes a R-hydroxy group at position 11 and a (3-methyl-2-oxopentanoyl)amino group at position at position 18 with a S-methyl group. It acts as a proteasome inhibitor and is obtained from Apiospora montagnei Sacc. TC 1093, isolated from a soil sample.

   

4-(dimethylamino)-N-[[(3R,9R,10S)-16-[(4-fluorophenyl)sulfonylamino]-12-[(2R)-1-hydroxypropan-2-yl]-3,10-dimethyl-13-oxo-2,8-dioxa-12-azabicyclo[12.4.0]octadeca-1(14),15,17-trien-9-yl]methyl]-N-methylbutanamide

4-(dimethylamino)-N-[[(3R,9R,10S)-16-[(4-fluorophenyl)sulfonylamino]-12-[(2R)-1-hydroxypropan-2-yl]-3,10-dimethyl-13-oxo-2,8-dioxa-12-azabicyclo[12.4.0]octadeca-1(14),15,17-trien-9-yl]methyl]-N-methylbutanamide

C34H51FN4O7S (678.3462308000001)


   

(1R,2R,3aR,5R,6E,10R,11S,13R,13aS)-1,3,3a,5,8,10,11,12,13,13a-Decahydro-1,2,3a,11,13-pentaacetoxy-10-(isobutyryloxy)-2,5,8,8-tetramethyl-12-methylene-4H-cyclopentacyclododecene-4,9(2H)-dione

(1R,2R,3aR,5R,6E,10R,11S,13R,13aS)-1,3,3a,5,8,10,11,12,13,13a-Decahydro-1,2,3a,11,13-pentaacetoxy-10-(isobutyryloxy)-2,5,8,8-tetramethyl-12-methylene-4H-cyclopentacyclododecene-4,9(2H)-dione

C34H46O14 (678.2887416)


   
   

[1-heptanoyloxy-3-[hydroxy-(2,3,4,5,6-pentahydroxycyclohexyl)oxyphosphoryl]oxypropan-2-yl] (7Z,10Z,13Z)-hexadeca-7,10,13-trienoate

[1-heptanoyloxy-3-[hydroxy-(2,3,4,5,6-pentahydroxycyclohexyl)oxyphosphoryl]oxypropan-2-yl] (7Z,10Z,13Z)-hexadeca-7,10,13-trienoate

C32H55O13P (678.3380109999999)


   

[1-[hydroxy-(2,3,4,5,6-pentahydroxycyclohexyl)oxyphosphoryl]oxy-3-pentanoyloxypropan-2-yl] (9Z,12Z,15Z)-octadeca-9,12,15-trienoate

[1-[hydroxy-(2,3,4,5,6-pentahydroxycyclohexyl)oxyphosphoryl]oxy-3-pentanoyloxypropan-2-yl] (9Z,12Z,15Z)-octadeca-9,12,15-trienoate

C32H55O13P (678.3380109999999)


   

[1-[hydroxy-(2,3,4,5,6-pentahydroxycyclohexyl)oxyphosphoryl]oxy-3-propanoyloxypropan-2-yl] (11Z,14Z,17Z)-icosa-11,14,17-trienoate

[1-[hydroxy-(2,3,4,5,6-pentahydroxycyclohexyl)oxyphosphoryl]oxy-3-propanoyloxypropan-2-yl] (11Z,14Z,17Z)-icosa-11,14,17-trienoate

C32H55O13P (678.3380109999999)


   

TMC-95B

TMC-95B

C33H38N6O10 (678.2649288)


A 17-membered macrocyclic lactam that incorporates a phenol and a substituted indole moiety. A stereoisomer of TMC-95A, it has a [(3R)-3-methyl-2-oxopentanoyl]amino group at position 18. It acts as a proteasome inhibitor and is isolated from Apiospora montagnei Sacc. TC 1093, isolated from a soil sample.

   

TMC-95C

TMC-95C

C33H38N6O10 (678.2649288)


A 17-membered macrocyclic lactam that incorporates a phenol and a substituted indole moiety. It includes a S-hydroxy group at position 11 and a (3-methyl-2-oxopentanoyl)amino group at position 18 with a S-methyl group. It acts as a proteasome inhibitor and is isolated from Apiospora montagnei Sacc. TC 1093, isolated from a soil sample.

   

TMC-95D

TMC-95D

C33H38N6O10 (678.2649288)


A 17-membered macrocyclic lactam that incorporates a phenol and a substituted indole moiety. It includes a R-hydroxy group at position 11 and a (3-methyl-2-oxopentanoyl)amino group at position at position 18 with a S-methyl group. It acts as a proteasome inhibitor and is obtained from Apiospora montagnei Sacc. TC 1093, isolated from a soil sample.