Three new cytotoxic Diels-Alder-type adducts from Morus australis.

Chem Biodivers

The Key Laboratory of Bioactive Substances and Resources Utilization of Chinese Herbal Medicine, Peking Union Medical College, Ministry of Education, Institute of Materia Medica, Chinese Academy of Medical Sciences, Beijing 100050, PR China.

Published: July 2007

Three new natural products, australisines A-C (1-3, resp.), were isolated from the stem bark of Morus australis, together with eight related compounds, including mulberrofurans E-G, J, and Q, mongolicin C, chalcomoracin, and kuwanon G. Their structures were fully characterized by spectroscopic methods. Compounds 1-3, mulberrofuran G, mongolicin C, and chalcomoracin showed moderate cytotoxic activities against five human cancer cell lines, with IC50 values ranging from 4.6-9.2 microg/ml, as determined by MTT assay.

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http://dx.doi.org/10.1002/cbdv.200790133DOI Listing

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