[10-membered bicyclic aromatic ring structure with 4 nitrogen heteroatoms at the 1,3,6,9 positions, giving the appearance of fused pyrimidine and pyrazine rings; 2-amino-4-keto derivative is characteristic of the folacins and other pterins. ( CSP )]
UMLS (CSP) C0033991 Relation/PAR: 2-Ring Heterocyclic Compound
nitrogenous heterocyclic compound
Relation/CHD: 4-Aminofolic acid
4-Amino-10-methylfolic Acid
folacin
pterin
TRIAMTERENE