1,3-dicarbomethoxy-4-oxopiperidine, 4-Oxo-1,3-piperidinedicarboxylic acid 1,3-dimethyl ester, 1,3-Piperidinedicarboxylicacid,4-oxo-,1,3-dimethyl ester, Dimethyl-4-oxo-1,3-piperidindicarboxylat, methyl 3-carbomethoxy-4-oxo-1-piperidinecarboxylate, EINECS 250-737-9