Dihydrochalcones and flavonolignans from Iryanthera lancifolia
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Data
1999-11-01
Autores
Silva, DHS
Davino, S. C.
Barros, SBD
Yoshida, M.
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Amer Chemical Soc
Resumo
An extract from the pericarps of I. lancifolia afforded two dihydrochalcones (1 and 2) and two flavonolignans (3 and 4), with compounds 2-4 being of novel structure. The antioxidant activities of compounds 1-4 were evaluated through the measurement of malondialdehyde production, and Q(1/2) (concentration necessary far 50% inhibition of autoxidation) data were calculated. The Q(1/2) values obtained for 1-4 and the standard compounds a-tocopherol and quercetin were 6.9, 4.7, 5.5, 4.8, 12.1, and 7.6 mu g/mL, respectively.
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Journal of Natural Products. Washington: Amer Chemical Soc, v. 62, n. 11, p. 1475-1478, 1999.