N-[9-[(2R,4S,5R)-5-[[bis(4-methoxyphenyl)-phenylmethoxy]methyl]-4-[(3-methyl-1,3,2-oxazaphospholidin-2-yl)oxy]oxolan-2-yl]purin-6-yl]benzamide 、 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]purin-6-yl]benzamide