C07D 491/107

With only one oxygen atom as ring hetero atom in the oxygen-containing

Official title: with only one oxygen atom as ring hetero atom in the oxygen-containing ring

C07D491/107 (With only one oxygen atom as ring hetero atom in the oxygen-containing) appears on 1,254 US grants and 2,035 published applications in this corpus.

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20111348
20121752
20135791
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202380179
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