Novel alkaloids containing the [2]benzopyrano[3,4-c]indole nucleus

The Journal of Organic Chemistry
1968.0

Abstract

Five new Amaryllidaceae alkaloids containing the [2] benzopyrano [3,4-c] indole nucleus have been isolated, and their structures were established. The structures and stereochemistry of haemanthidine(5a) and macronine (4b) are completely defined. Evidence is presented that tazettine (1a, R = H) and criwelline (1b, R = H) may be rearrangement artifacts. © 1968, American Chemical Society. All rights reserved.

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