上游原料
4-Piperidinol; 4-HydroxypiperidineBromodiphenylmethane; 1-[Bromo(phenyl)methyl]benzene; Benzhydrylbromide1,3-Dibromopropane7-(3-Bromopropyl)-1,3-dimethyl-3,7-dihydro-1H-purine-2,6-dione7-[3-(4-Hydroxy-1-piperidinyl)propyl]-1,3-dimethyl-3,7-dihydro-1H-purine-2,6-dione1,3-dimethyl-3,7-dihydro-1H-purine-2,6-dione7-{3-[4-(benzhydryloxy)-1-piperidinyl]propyl}-1,3-dimethyl-3,7-dihydro-1H-purine-2,6-dione
