having two doubly-bound oxygen atoms directly attached in positions 2 and 5

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 > having two doubly-bound oxygen atoms directly attached in positions 2 and 5

Child Classifications

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• C07D 207/448 with only hydrogen atoms or radicals containing only hydrogen and carbon atoms directly attached to other ring carbon atoms, e.g. maleimide
• C07D 207/456 with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals, directly attached to other ring carbon atoms