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Keywords: 13220-57-0 OR tcmdc-125859 OR tryptanthrin OR Tryptanthrine OR Couroupitine A OR indolo(2,1-b)quinazolin-6,12-dione OR Indolo(2,1-b)quinazoline-6,12-dione OR Indolo[2,1-b]quinazoline-6,12-dione OR 6H,12H-INDOLO[2,1-B]QUINAZOLINE-6,12-DIONE
