哌啶-1-甲醛

N,N'-(butane-1,2-diylidene)bis(butan-1-amine)

N-(2-(piperidin-1-yl)but-2-en-1-ylidene)butan-1-amine

N,N'-(butane-1,2-diylidene)dimethanamine

N-(2-(piperidin-1-yl)but-2-en-1-ylidene)methanamine