TIANFUCHEM-4,4′-Bipiperidine, 1-[(2S)-2-[(3,4-diethylphenyl)methyl]-1,4-dioxo-4-[4-(1,2,4,5-tetrahydro- 2-oxo-3H-1,3-benzodiazepin-3-yl)-1-piperidinyl]butyl]-