DIFF Subgroup
C07D 207/44 having three double bonds between ring members or between ring members and non-ring members
Introduced: July 1974
Full Title
Heterocyclic compounds containing five-membered rings not condensed with other rings, with one nitrogen atom as the only ring hetero atom > with only hydrogen or carbon atoms directly attached to the ring nitrogen atom > having three double bonds between ring members or between ring members and non-ring members
IPC and CPC are identically structured here. All 1 subcodes exist in both systems.
IPC defines codes here since 1980.
Child Classifications
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- C07D 207/444 having two doubly-bound oxygen atoms directly attached in positions 2 and 5 since 1980 IPC+CPC Available in IPC and CPC