rel-(6'R,7'R)-7'-(3,4-dimethoxyphenyl)-1-(4-chlorophenyl)-3',7'-dihydro-2H,2'H,5H-spiro(pyrolidin-3,6'-thiopyrano(2,3-d)thiazol)-2,2',5-trione
rel-(6'r,7'r)-7'-(3,4-dimethoxyphenyl)-1-(4-chlorophenyl)-3',7'-dihydro-2h,2'h,5h-spiro(pyrolidin-3,6'-thiopyrano(2,3-d)thiazol)-2,2',5-trione