(2R-cis)-5,5-Dimethyl-2,4-thiazolidinedicarboxylic acid 142185-31-7 2,4-Thiazolidinedicarboxylic acid, 5,5-dimethyl-, (2R-cis)- 5,5-Dimethylthiazolidine-2,4-dicarboxylic acid 5,5-Dtdc