N-{9-[(2R,4S,5R)-5-[Bis-(4-methoxy-phenyl)-phenyl-methoxymethyl]-4-(3-methyl-[1,3,2]oxazaphospholidin-2-yloxy)-tetrahydro-furan-2-yl]-6-oxo-6,9-dihydro-1H-purin-2-yl}-isobutyramide 、 alkaline earth salt of/the/ methylsulfuric acid 生成 N-[9-[(2R,4S,5R)-5-(hydroxymethyl)-4-[[(2R,3S,5R)-3-hydroxy-5-(5-methyl-2,4-dioxopyrimidin-1-yl)oxolan-2-yl]methoxy-oxidophosphinothioyl]oxyoxolan-2-yl]-6-oxo-1H-purin-2-yl]-2-methylpropanamide