A method for obtaining a derivative of lidina tiazo-

摘要

Thiazolidine derivatives of the general formula: IMAGE [wherein R1 is alkyl, cycloalkyl, phenylalkyl, phenyl, a five- or six-membered heterocyclic group including one or two hetero-atoms selected from the group consisting of nitrogen, oxygen and sulfur or a group of the formula IMAGE (where R3 and R4 are the same or different and each is lower alkyl or R3 and R4 are combined to each other either directly or as interrupted by a hetero-atom selected from the group consisting of nitrogen, oxygen and sulfur to form a five- or six-membered ring); R2 means a bond or a lower alkylene group; L1 and L2 are the same or different and each is lower alkyl or L1 and L2 are combined to form an alkylene group, provided that when R1 is other than alkyl, L1 and L2 may further be hydrogen, respectively] are novel compounds and useful as, for example, remedies for diabetes, hyperlipemia and so on of mammals including human beings.