1 5ZZ (2~{R},4~{R})-2,5,5-trimethyl-1,3-thiazolidine-2,4-dicarboxylic acid 1.000 2 41K (2r,4r)-2-methyl-1,3-thiazolidine-2,4-dicarboxylic acid 0.857 3 5XB (2~{R},4~{R})-1,3-thiazolidine-2,4-dicarboxylic acid 0.786 4 BIY (3s)-2,2-dimethyl-3,4-dihydro-2h-1,4-thiazine-3,6-dicarboxylic acid 0.750 5 9SE (2~{R},4~{R})-2-methyl-1,3-selenazolidine-2,4-dicarboxylic acid 0.733 6 QST (2~{S},4~{S})-2-ethoxycarbonyl-5,5-dimethyl-2-(sulfanylmethyl)-1,3-thiazolidine-4-carboxylic acid 0.722 7 QT2 (2~{S},4~{R})-2-ethoxycarbonyl-5,5-dimethyl-2-(sulfanylmethyl)-1,3-thiazolidine-4-carboxylic acid 0.722 8 2MT (4r)-2,2-dimethyl-1,3-thiazolidine-4-carboxylic acid 0.714