N,1-bis(4-nitrophenyl)-1-piperidin-1-ylmethanimine

1-ethyl-1-(2-phenylethyl)piperidin-1-ium,iodide

ethyl 4,4-diethoxy-3-oxo-2-(thiophen-2-ylmethylidene)butanoate

1-(4-bromophenyl)-2-piperidin-1-ylethanol

(3-nitrophenyl)-piperidin-1-ylmethanethione