[(2S,8S)-8-(tert-Butyl-diphenyl-silanyloxymethyl)-1,3,4,6,7,8-hexahydro-2H-pyrimido[1,2-a]pyrimidin-2-yl]-methanol 、
间苯二异氰酸酯 生成 [(2S,8S)-8-(hydroxymethyl)-9a-perchloryloxy-1,2,3,4,6,7,8,9-octahydropyrimido[1,2-a]pyrimidin-2-yl]methyl N-[3-[[(2S,8S)-8-(hydroxymethyl)-9a-perchloryloxy-1,2,3,4,6,7,8,9-octahydropyrimido[1,2-a]pyrimidin-2-yl]methoxycarbonylamino]phenyl]carbamate