triethyl 2-cyano-1,2,3-propanetricarboxylate, 2-cyano-propane-1,2,3-tricarboxylic acid triethyl ester, triethyl 2-phosphono-2-butenoate, 2-Cyan-propan-1,2,3-tricarbonsaeure-triaethylester, 3-Cyano-3-ethoxycarbonylglutarsaeurediethylester, triethyl 2-phosphonobut-2-enoate