1-METHYL (.ALPHA.R,3Z,4R)-3-(CARBOXYMETHYLENE)-.ALPHA.-(2-CHLOROPHENYL)-4-MERCAPTO-1-PIPERIDINEACETATE
1-methyl (.alpha.r,3z,4r)-3-(carboxymethylene)-.alpha.-(2-chlorophenyl)-4-mercapto-1-piperidineacetate