(+/-)-N-(trans-5-phenyl-thiazolidine-4-carbonyl)-glycine-methyl ester
(+/-)-N-(2-methylsulfanyl-5t-phenyl-4,5-dihydro-thiazole-4r-carbonyl)-glycine-methyl ester
(+/-)-N-(2-methylsulfanyl-5t-phenyl-4,5-dihydro-thiazole-4r-carbonyl)-glycine
(+/-)-N-(trans-5-phenyl-thiazolidine-4-carbonyl)-glycine
(+/-)-1c-phenyl-(8ar)-tetrahydro-thiazolo[3,4-a]pyrazine-5,8-dione