2-((alpha-Hydroxy-beta-carboethoxy-beta-cyanoethylene)imino)-1-methyl piperidine 2-Cyano-3-hydroxy-3-(1-methyl-2-piperidylidene)acrylic acid ethyl ester 2-Propenoic acid, 2-cyano-3-hydroxy-3-((1-methyl-2-piperidinylidene)amino)-, ethyl ester 75263-97-7 Acrylic acid, 2-cyano-3-hydroxy-3-(1-methyl-2-piperidylidene)-, ethyl ester