(1(E),2-alpha,5-beta)-3-(2,5-Dimethyl-4-oxo-1-piperidinyl)-2-propenoic acid methyl ester 111025-10-6 2-Propenoic acid, 3-(2,5-dimethyl-4-oxo-1-piperidinyl)-, methyl ester, (1(E),2-alpha,5-beta)- trans-N-beta-(2e,5e-Dimethyl-4-oxo-1-piperidyl)acrylic acid methyl ester