Formula: C32H22N4O4 | Mol. Weight: 526.50 g/mol
IUPAC: (3S)-1',2'-bis(1H-indol-3-yl)-3',5'-dioxospiro[2,3,4,9-tetrahydropyrido[3,4-b]indole-1,4'-cyclopentene]-3-carboxylic acid
C1C(NC2(C3=C1C4=CC=CC=C4N3)C(=O)C(=C(C2=O)C5=CNC6=CC=CC=C65)C7=CNC8=CC=CC=C87)C(=O)O