2-Amino-4-hydroxy-6,7-dimethyl-5,6,7,8-tetrahydropteridine 2-Amino-4-hydroxy-6,7-dimethyltetrahydropteridine 4(1H)-Pteridinone, 2-amino-5,6,7,8-tetrahydro-6,7-dimethyl- 6,7-Dimethyl-5,6,7,8-tetrahydropterin 611-54-1 945-43-7 DMPH4 NSC 146788