scheme49
![Recent advances in organocatalytic cascade reactions for enantioselective synthesis of chiral spirolactone skeletons](https://image.oaes.cc/81dabbbc-923b-43d2-a26d-fe5689f6999d/5406.scheme.49.jpg)
Scheme 49. Stereocontrolled synthesis of spiro oxindole-butyrolactones and maremycin A. This figure is used with permission from John Wiley and Sons Ltd[123].
Scheme 49. Stereocontrolled synthesis of spiro oxindole-butyrolactones and maremycin A. This figure is used with permission from John Wiley and Sons Ltd[123].
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