7,10-Methano-5H-benzo[e]naphtho[1,2-c][1,2]thiazine-8,9-dicarboxylicanhydride (8CI);7,11-Methano-5H-furo[3,4-g]naphtho[1,2-c][1,2]benzothiazine-8,10-dione (9CI);7,10-Methano-5H-benzo[e]naphtho[1,2-c][1,2]triazine-8,9-dicarboxylic anhydride
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