a chemical compound containing four fused rings
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ethyl 4-(3'-chlorophenylamino)-1-phenyl-1H-pyrazolo[3,4-b]pyridine-5-carboxylate
6-acetyl-3-amino-5-(4-chlorophenyl)-2-phenyl-2,5-dihydro-4-pyridazinecarbonitrile
2-(2-Cyclohexa-1,4-dienyl-ethoxymethylene)-malonic acid dimethyl ester
trans-2,7-Dimethyl-2,6-octadienyl-phenylthioether
1H-Indole-2-carboxaldehyde, 1-[(4-methoxyphenyl)sulfonyl]-3-methyl-
1-methyl-3'H-spiro[indoline-2,1'-isobenzofuran]-3,3'-dione
