Potential cancer chemopreventive agents from Arbutus unedo |
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| Authors: | Carcache-Blanco Esperanza J Cuendet Muriel Park Eun Jung Su Bao-Ning Rivero-Cruz J Fausto Farnsworth Norman R Pezzuto John M Douglas Kinghorn A |
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| Institution: | Program for Collaborative Research in the Pharmaceutical Sciences and Department of Medicinal Chemistry and Pharmacognosy, College of Pharmacy, University of Illinois at Chicago, Chicago, IL 60612, USA. |
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| Abstract: | A phytochemical study of the petroleum ether and ethyl acetate extracts of the entire plant of Arbutus unedo led to the isolation of a new sterol, 7beta-hydroxystigmast-4-en-3-one (1), and nine known compounds of the flavan, steroid, and terpenoid types. The structure of 1 was determined by spectroscopic data interpretation in combination with molecular modeling calculations. The absolute stereochemistry of C-7 was assigned as S for compound 1 based on the obtained CD spectral data. Activity in the JB6 cell transformation assay was found for pomolic acid 3-acetate (4). All isolates obtained were evaluated in a cyclooxygenase-2 (COX-2) inhibition assay. |
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