A new conformer of 20-hydroxyecdysone from Sesuvium portulacastrum: an x-ray crystallographic study |
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| Authors: | Rele Shyam Banerji Asoke Chintalwar Gajanan Kumar Vinay Yadava Vijay |
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| Affiliation: | Bio-Organic Division, Bhabha Atomic Research Centre, Trombay, Mumbai 400 085, India. smrele@emory.edu |
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| Abstract: | X-ray single crystal analysis of 20-hydroxyecdysone (20E, 2), an important insect moulting hormone, isolated from Sesuvium portulacastrum Linn. was found to exhibit a unique stereochemical configuration revealing it to be a different conformer (polymorph) possessing the aliphatic chain atoms in a trans configuration. Moreover, the analysis also revealed the presence of three molecules of water of crystallisation thereby restricting the freedom of the aliphatic side chain. |
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