A revision of the structure of cucurbitacin S from Bryonia dioica |
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| Authors: | Peter J Hylands El-Sayed S Mansour |
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| Institution: | Pharmacognosy Research Laboratories, Department of Pharmacy, Chelsea College, University of London, Manresa Road, London SW3 6LX, U.K. |
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| Abstract: | 1H NMR studies at 400 MHz on cucurbitacin S and its derivatives suggest that the structure of cucurbitacin S previously isolated from Bryonia dioica should be revised from (22S)-22, 25-anhydro-2,16α,22,25-tetrahydroxy-3,11,23-trioxo-cucurbita-1,5-diene to (24S)-16,24-anhydro- 2,16α,24,25-tetrahydroxy-3,11,22-trioxo-cucurbita-1,5-diene. |
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| Keywords: | Cucurbitaceae cucurbitacins cucurbitacin S |
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