1-(3-Formyl-4-nitrophenyl)piperazine hydrochloride
5-<4-(3,4-dimethoxybenzoyl)-1-piperazinyl>-2-nitrobenzoic acid
methyl 2-amino-5-<4-(3,4-dimethoxybenzoyl)-1-piperazinyl>benzoate
1-(3,4-dimethoxybenzoyl)-4-(3-formyl-4-nitrophenyl)piperazine
2-nitro-5-chlorobenzaldehyde dimethyl acetal