ethyl 2-(ethoxycarbonyl)-4-(p-nitrophenyl)butanoate

diethyl 2,2-bis[2-(4-nitrophenyl)ethyl]propanedioate

N,N-DIMETHYL-P-NITROPHENETHYLAMINE

ethyl 2,2-bis[2-(4-nitrophenyl)ethyl]-3-oxobutanoate

1-[2-(4-nitrophenyl)ethyl]piperidine