Acyclovir59277-89-333 % similar Ganciclovir82410-32-033 % similar Xanthopterin monohydrate5979-01-133 % similar 2-Amino-6-hydroxy-4(3H)-pyrimidinone56-09-732 % similar O-(6)-Methylguanine20535-83-532 % similar Thioguanine154-42-731 % similar Dideoxyguanosine85326-06-331 % similar 2-Amino-6-chloro-4(1H)-pyrimidinone1194-21-431 % similar 2-Amino-6-methylpyrimidin-4-one3977-29-531 % similar 2-Aminoisocytosine56-06-431 % similar 4-[2-(2-Amino-4,7-dihydro-4-oxo-3H-pyrrolo[2,3-d]pyrimidin-5-yl)ethyl]benzoic acid137281-39-130 % similar Nolatrexed147149-76-630 % similar