4-(4-chlorophenyl)azepan-4-ol,hydrochloride

ethyl 4-[(4-chlorophenyl)imino]-1-piperidine-carboxylate

对甲苯磺酸

乙基4-羟基-4-甲基-1-哌啶羧酸酯

1-(N-乙氧羰基)-3-甲氧基-4-哌啶酮