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PCE
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DIFF Subgroup
C08K 5/35

having also oxygen in the ring

Introduced: July 1974

Full Title

Use of organic ingredients > Nitrogen-containing compounds > Heterocyclic compounds having nitrogen in the ring > having also oxygen in the ring

IPC and CPC are identically structured here. All 2 subcodes exist in both systems.

IPC defines codes here since 1990.

Child Classifications

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  • C08K 5/353 Five-membered rings since 1990 IPC+CPC Available in IPC and CPC
  • C08K 5/357 Six-membered rings since 1990 IPC+CPC Available in IPC and CPC