BENZOTHIOANTHENEDICARBOXYLICANHYDRIDE

Benzothioxanthene dicarboxylic anhydride

1H,3H-2-Oxa-6-thiabenzo[a]pyrene-1,3-dione

Benzo[kl]thioxanthene-3,4-dicarboxylic anhydride

1h,3h-thioxantheno[2,1,9-def]-2-benzopyran-1,3-dione