1,4-Dithiino[2,3-c]furan-5,7-dione, 2,3-dihydro-
p-Dithiin-2,3-dicarboxylic anhydride, 5,6-dihydro-
2,3-Dihydro-1,4-dithiino[2,3-c]furan-5,7-dione
3,6-Dithiacyclohexene-1,2-dicarboxylic anhydride
3,6-Dithiacyclohexene-1,2-dicarboxylic acid anhydride
3,6-Dithia-Δ1-cyclohexene-1,2-dicarboxylic anhydride
3,6-Dithia-3,4,5,6-tetrahydrophthalic anhydride
5,6-Dihydro-p-dithiin-2,3-dicarboxylic anhydride
3,6-Dithia-1-cyclohexene-1,2-dicarboxylic anhydride
5,6-Dihydro-4,7-dithiaphthalic anhydride
5,6-Dihydro-1,4-dithiin-2,3-dicarboxylic anhydride
2H,3H,5H,7H-[1,4]Dithiino[2,3-c]furan-5,7-dione