DIFF Subgroup
A61K 31/075 Ethers or acetals
Introduced: July 1974
Full Title
Medicinal preparations containing organic active ingredients > Ethers or acetals
IPC and CPC are identically structured here. All 2 subcodes exist in both systems.
IPC defines codes here since 1974.
Child Classifications
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- A61K 31/085 having an ether linkage to aromatic ring nuclear carbon since 1974 IPC+CPC Available in IPC and CPC