Ring systems containing three or more rings

Introduced: July 1974

Full Title

Heterocyclic compounds containing five-membered rings, condensed with other rings, with one nitrogen atom as the only ring hetero atom > Ring systems containing three or more rings

IPC and CPC are identically structured here. All 3 subcodes exist in both systems.

IPC defines codes here since 1974.

Child Classifications

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C07D 209/58 [b]- or [c]-condensed since 1974 IPC+CPC Available in IPC and CPC
C07D 209/80 [b, c]- or [b, d]-condensed since 1974 IPC+CPC Available in IPC and CPC
C07D 209/96 Spiro-condensed ring systems since 1974 IPC+CPC Available in IPC and CPC