(3R-trans)-6,7-Dichloro-2,3,5,7a-tetrahydro-5-oxopyrrolo(2,1-b)thiazole-3-carboxylic acid, methyl ester 142762-84-3 3R-trans-6,7-Dichloro-2,3,5,7a-tetrahydro-5-oxo-pyrrolo(2,1-b)thiazole-3-carboxylic acid methyl ester CCRIS 7032