O6-(2-cyanoethyl)-N2-isobutyryl-5'-O-[bis(4-methoxyphenyl)(phenyl)methyl]-3'-O-[(2S,5S)-3-methyl-5-phenyl-1,3,2-oxazaphospholidin-2-yl]-2'-deoxyguanosine 、 alkaline earth salt of/the/ methylsulfuric acid 生成 (R)-Thiophosphoric acid O-[(2R,3S,5R)-5-(2-amino-6-oxo-1,6-dihydro-purin-9-yl)-2-hydroxymethyl-tetrahydro-furan-3-yl] ester O'-[(2R,3S,5R)-3-hydroxy-5-(5-methyl-2,4-dioxo-3,4-dihydro-2H-pyrimidin-1-yl)-tetrahydro-furan-2-ylmethyl] ester; compound with ammonia