Journal
JOURNAL OF NATURAL PRODUCTS
Volume 72, Issue 8, Pages 1447-1452Publisher
AMER CHEMICAL SOC
DOI: 10.1021/np900109y
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Biyouyanagiol (1), an acylphloroglucinol-related compound having a unique cyclopenta-1,3-dione moiety, was isolated from a Japanese traditional medicinal plant, Hypericum chinense, together with three new spiro-lactone-related derivatives, biyouyanagin B (2), 5,6-dihydrohyperolactone D (3), and 4-hydroxyhyperol.actone D (4). Their structures were established on the basis of spectroscopic evidence. In a cytotoxicity assay against human cancer cell lines including multidrug-resistant (MDR) cancer cell lines, several compounds demonstrated enhanced cytotoxicity against MDR KB cells in the presence of colchicine.
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