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Ent-kauranes and other constituents of three Helianthus species

✍ Scribed by Werner Herz; Palaniappan Kulanthaivel; Kinzo Watanabe

Publisher: Elsevier Science
Year: 1983
Tongue: English
Weight: 614 KB
Volume: 22
Category: Article
ISSN: 0031-9422
DOI: 10.1016/0031-9422(83)80036-3

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## Abstract Following our phytochemical studies of Costa Rican plants, we report the isolation of two new 3,4‐seco‐__ent__‐kaurenes from the aerial parts of __Croton megistocarpus__ (Euphorbiaceae). The structures of the two compounds were elucidated as 14‐[(2‐methylbutanoyl)oxy]‐3,4‐seco‐__ent‐__k