牛膝の成分研究(第8報) : Achyranthes属植物中の昆虫変態活性物質(補遺その2)

概要

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Distribution of insect-moulting hormones in Achyranthes genus plants growing in various regions was examined. Ecdysterone (I) and inokosterone (II) were detected from A. japonica var. hachijoensis growing in Tanegashima, A. rubrofusca growing in Okinawa, and A. longifolia cultivated in Tokyo. I was detected from A. mollicula growing in Amamioshima and Formosa, A. obtusifolia growing in Yoronjima, A. ogatai growing in Formosa, A. bidentata growing in Bhutan, A. aspera growing in Nepal, and A. sp. growing in Kenya. Rubrosterone (III) was isolated with I from Formosan A. obtusifolia. A new substance (IV) of mp 278°, named epiecdysterone, was isolated from a Japanese A. fauriei, with I, II, and III. The structure of IV was concluded to be 5α-ecdysterone from its physicochemical properties. IV was identified with a crystalline product epimerized from I. Biological activity of IV was not so marked when tested with abdomen of Sarcophaga peregrina.
1971-09-25