REL-ETHYL (.ALPHA.R,.BETA.R)-.ALPHA.-(4-METHOXYBENZOYL)-.BETA.-(NITROMETHYL)-1,3-BENZODIOXOLE-5-PROPANOATE
rel-ethyl (.alpha.r,.beta.r)-.alpha.-(4-methoxybenzoyl)-.beta.-(nitromethyl)-1,3-benzodioxole-5-propanoate