Synonyms: 1,2,3-Propanetriol,1-(2-amino-4-hydroxy-6-pteridinyl)-, L-threo- (8CI); 4(1H)-Pteridinone, 2-amino-6-(1,2,3-trihydroxypropyl)-,[S-(R*,R*)]-; 4(1H)-Pteridinone, 2-amino-6-[(1S,2S)-1,2,3-trihydroxypropyl]-(9CI); 4(3H)-Pteridinone, 2-amino-6-(L-threo-trihydroxypropyl)- (7CI);L-(+)-Monapterin; L-6-(threo-1',2',3'-Trihydroxypropyl)pterin; L-Monapterin;L-threo-Monapterin; L-threo-Neopterin; Monapterin, L-(+)-; Neopterin, L-threo-