上游原料
1-Isocyanatobenzene; phenyl isocyanate; Phenylisocyanate2,3-Dihydro-4H-chromen-4-one; 4-Chromanone2-(1-benzyl-4-piperidinyl)-1-ethanamine; 2-(1-benzyl-4-piperidinyl)ethylamineN-[2-(1-benzyl-4-piperidinyl)ethyl]-N'-phenylureaN-phenyl-N'-[2-(4-piperidinyl)ethyl]ureaN-(2-[1-[(4-oxo-3,4-dihydro-2H-chromen-3-yl)methyl]-4-piperidinyl]ethyl)-N'-phenylureaN-(2-[1-[(4-hydroxy-3,4-dihydro-2H-chromen-3-yl)methyl]-4-piperidinyl]ethyl)-N'-phenylurea
