2-amino-6-[(1R,2S)-1,2-dihydroxypropyl]-7,8-dihydro-1H-pteridin-4-one 4(1H)-pteridinone, 2-amino-6-[(1R,2S)-1,2-dihydroxypropyl]-7,8-dihydro- L-erythro-7,8-Dihydrobiopterin 4(1H)-Pteridinone, 2-amino-6-((1R,2S)-1,2-dihydroxypropyl)-7,8-dihydro- 4(1H)-Pteridinone, 2-amino-6-(1,2-dihydroxypropyl)-7,8-dihydro-, (S-(R*,S*))- Quinonoid dihydrobiopterin HBI 7,8-DIHYDRO-L-BIOPTERIN HBL 1,2-Propanediol, 1-(2-amino-7,8-dihydro-4-hydroxy-6-pteridinyl)-, L-erythro- 4(1H)-Pteridinone, 2-amino-6-(1,2-dihydroxypropyl)-7,8-dihydro-, [S-(R*,S*)]-