(2RS)-2-[(2-Amino-6-oxo-1,6-dihydro-9H-purin-9-yl)methoxy]-3-hydroxypropyl propionate;2-[(2-Amino-6-oxo-1,6-dihydro-9H-purin-9-yl)methoxy]-3-hydroxypropyl propionate (as per USP);Ganciclovir monopropionate;