Structure of the 4-oxo-2-butenoic acid alkyl ester moiety. I. Structures of diethyl 4,4'-(1,4-piperazinediyl)bis(4-oxo-2-butenoate) and dimethyl 4,4'-(2,5-dioxo-1,4-piperazinediyl)bis(4-oxo-2-butenoate)
Title:
Structure of the 4-oxo-2-butenoic acid alkyl ester moiety. I. Structures of diethyl 4,4'-(1,4-piperazinediyl)bis(4-oxo-2-butenoate) and dimethyl 4,4'-(2,5-dioxo-1,4-piperazinediyl)bis(4-oxo-2-butenoate)