scheme42

Scheme 42. Spirolactonization reaction of 3-hydroxyoxindoles 69 and α, β-unsaturated coumarin-3-formylpyrazoles 79. This figure is used with permission from the American Chemical Society[104].
Scheme 42. Spirolactonization reaction of 3-hydroxyoxindoles 69 and α, β-unsaturated coumarin-3-formylpyrazoles 79. This figure is used with permission from the American Chemical Society[104].
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