having oxygen as the only ring hetero atom, e.g. fungichromin

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Medicinal preparations containing organic active ingredients > Heterocyclic compounds > having oxygen as the only ring hetero atom, e.g. fungichromin

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• A61K 31/336 having three-membered rings, e.g. oxirane, fumagillin
• A61K 31/337 having four-membered rings, e.g. taxol
• A61K 31/34 having five-membered rings with one oxygen as the only ring hetero atom, e.g. isosorbide
• A61K 31/35 having six-membered rings with one oxygen as the only ring hetero atom
• A61K 31/357 having two or more oxygen atoms in the same ring, e.g. crown ethers, guanadrel
• A61K 31/365 Lactones