Abstract: | Summary From the flower heads ofRhaponticum integrifolium we have isolated a new phytoecdysone — integristerone B. It has been shown that it is 1 , 2 , 3 , 5 , 14 , 20R, 22R, 25-octahydroxy-5 -cholest-7-en-6-one.Institute of the Chemistry of Plant Substances, Academy of Sciences of the Uzbek SSR, Tashkent. Translated from Khimiya Prirodnykh Soedinenii, No. 4, pp. 457–463, July–August, 1978. |