DIFF Subgroup
A61K 31/395 having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins
Introduced: July 1974
Full Title
Medicinal preparations containing organic active ingredients > Heterocyclic compounds > having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins
Of 11 combined children, 10 exist in both systems.
1 codes are CPC-only extensions.
5 shared codes have differing titles between IPC and CPC.
IPC defines codes here since 1974.
Child Classifications
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- A61K 31/40 having five-membered rings with one nitrogen as the only ring hetero atom, e.g. sulpiride, succinimide, tolmetin, buflomedil since 1974 IPC+CPC Available in IPC and CPC
- A61K 31/41 having five-membered rings with two or more ring hetero atoms, at least one of which being nitrogen, e.g. tetrazole since 1974 IPC+CPC Available in IPC and CPC
- A61K 31/435 having six-membered rings with one nitrogen as the only ring hetero atom since 1974 IPC+CPC Available in IPC and CPC
- A61K 31/495 having six-membered rings with two nitrogen atoms as the only ring heteroatoms, e.g. piperazine (A61K31/48 takes precedence ) since 1974 IPC+CPC Available in IPC and CPC
- A61K 31/53 having six-membered rings with three nitrogens as the only ring hetero atoms, e.g. chlorazanil, melamine (melarsoprol A61K31/555 ) since 1974 IPC+CPC Available in IPC and CPC
- A61K 31/535 having six-membered rings with at least one nitrogen and one oxygen as the ring hetero atoms, e.g. 1,2-oxazines since 1974 IPC+CPC Available in IPC and CPC
- A61K 31/54 having six-membered rings with at least one nitrogen and one sulfur as the ring hetero atoms, e.g. sulthiame since 1974 IPC+CPC Available in IPC and CPC
- A61K 31/55 having seven-membered rings, e.g. azelastine, pentylenetetrazole since 1974 IPC+CPC Available in IPC and CPC