上游原料
Piperidine2-[(2-hydroxyethyl)amino]-1-ethanol2,4,6,8-tetrachloropyrimido[5,4-d]pyrimidine2,6-dichloro-4,8-di(1-piperidinyl)pyrimido[5,4-d]pyrimidine2-[[6-[bis(2-hydroxyethyl)amino]-4,8-di(1-piperidinyl)pyrimido[5,4-d]pyrimidin-2-yl](2-hydroxyethyl)amino]-1-ethanol2-[[6-[bis(2-hydroxyethyl)amino]-4-(1-piperidinyl)-5,6,7,8-tetrahydropyrimido[5,4-d]pyrimidin-2-yl](2-hydroxyethyl)amino]-1-ethanol
