One oxygen atom attached in position 3 or 5

Full Title

Heterocyclic compounds containing 1,2-diazole or hydrogenated 1,2-diazole rings > not condensed with other rings > having two or three double bonds between ring members or between ring members and non-ring members > 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 ring carbon atoms > One oxygen or sulfur atom > One oxygen atom attached in position 3 or 5

Child Classifications

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• C07D 231/22 with aryl radicals attached to ring nitrogen atoms