6-(diisobutylamino-methyl)-2-phenyl-2,3-dihydro-[1,4]dithiino[2,3-c]pyrrole-5,7-dione
6-hydroxymethyl-2-phenyl-2,3-dihydro-[1,4]dithiino[2,3-c]pyrrole-5,7-dione
6-(4-nitro-phenylsulfanyl)-2-phenyl-2,3-dihydro-[1,4]dithiino[2,3-c]pyrrole-5,7-dione
6-bromo-2-phenyl-2,3-dihydro-[1,4]dithiino[2,3-c]pyrrole-5,7-dione
2,2'-diphenyl-2,3,2',3'-tetrahydro-6,6'-sulfonyl-bis-[1,4]dithiino[2,3-c]pyrrole-5,7-dione