(S)-2-((2-amino-6-oxo-3H-purin-9(6H)-yl)methoxy)ethyl 3-methyl-2-(methylamino)butanoate;2-[(2-Amino-1,6-dihydro-6-oxo-9H-purin-9-yl)methoxy]ethylester N-Methyl-L-Valine
(S)-2-((2-amino-6-oxo-3H-purin-9(6H)-yl)methoxy)ethyl 3-methyl-2-(methylamino)butanoate;2-[(2-Amino-1,6-dihydro-6-oxo-9H-purin-9-yl)methoxy]ethylester N-Methyl-L-Valine