Patent classifications
C
CHEMISTRY; METALLURGY
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C07
ORGANIC CHEMISTRY
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C07D
HETEROCYCLIC COMPOUNDS
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209/00
Heterocyclic compounds containing five-membered rings, condensed with other rings, with one nitrogen atom as the only ring hetero atom
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C07D209/56
Ring systems containing three or more rings
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C07D209/80
[b, c]- or [b, d]-condensed
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C07D209/90
Benzo [c, d] indoles; Hydrogenated benzo [c, d] indoles
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C07D209/92
Naphthostyrils
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