Pterin
Pterin is a chemical compound composed of a pyrazine ring and a pyrimidine ring; Pterin is a heterocyclic compound composed of a pyrazine ring and a pyrimidine ring (a pteridine ring system); the pyrimidine ring has a carbonyl oxygen and an amino group. Several tautomers of pterin exist and are shown below. As a group, pterins are compounds that are derivatives of 2-amino-4-oxopteridine, with additional functional groups attached to the pyrazine ring.; the pyrimidine ring has a carbonyl oxygen and an amino group. Several tautomers of pterin exist and are shown below. Pterin belongs to the pteridine family of heterocycles. -- Wikipedia. Pterin is found in soy bean. Pterin is a chemical compound composed of a pyrazine ring and a pyrimidine ring; the pyrimidine ring has a carbonyl oxygen and an amino group. Several tautomers of pterin exist and are shown below. Pterin belongs to the pteridine family of heterocycles. -- Wikipedia.
D-Biopterin
D-Biopterin is a pterin which is a chemical compound composed of a pyrazine ring and a pyrimidine ring. The level of biopterin decreases in the urine of patients with guanosine triphosphate cyclohydrolase I. (PMID 10770663) [HMDB] D-Biopterin is a pterin which is a chemical compound composed of a pyrazine ring and a pyrimidine ring. The level of biopterin decreases in the urine of patients with guanosine triphosphate cyclohydrolase I. (PMID 10770663). 6-Biopterin (L-Biopterin), a pterin derivative, is a NO synthase cofactor.