Journal
CHEMICAL & PHARMACEUTICAL BULLETIN
Volume 57, Issue 5, Pages 495-498Publisher
PHARMACEUTICAL SOC JAPAN
DOI: 10.1248/cpb.57.495
Keywords
Macaranga sampsonii; Macaranga; prenylflavonol; flavonoid
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Four novel prenylflavonols, macaranones A-D (1-4), were isolated from the leaves of Macaranga sampsonii. Their structures were elucidated on the basis of spectroscopic data. Macaranones C (3) and D (4) represent first two examples of flavonols having an unusual peltogynoid skeleton which is formed from a 2'-geranylflavonol by cyclization between 3-OH and C-1 '' of the 2'-geranyl substituent of the flavonol. Compounds 1-4 were evaluated for the cytotoxicity against several human cancer cell lines.
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