Methyl-5,6-dihydro-7-hydroxy-5-methyl-6-oxo-2,2-diphenyl-1,3-dithiino(5,4-b)pyrrol-4-carboxylat

Ethyl-4,4a,5,6,7,7a-hexahydro-4a,7-dihydroxy-5-methyl-6-oxo-2,2-diphenyl-1,3-dithiino<5,4-b>pyrrol-7-carboxylat