Resveratrol: Isomeric Molar Absorptivities and Stability by Brent C. Trela and Andrew L. Waterhouse

Brent C. Trela and Andrew L. Waterhouse, Journal of Agricultural and Food Chemistry 44(5), 1253–1257 (16 May 1996), DOI 10.1021/jf9504576. Exact full byline and UC Davis Viticulture and Enology affiliation verified in the publisher indexed page. Abstract reports ethanol absorption maxima: trans-resveratrol 308 nm with molar absorptivity 30000, cis-resveratrol 288 nm with molar absorptivity 12600, in L mol^-1 cm^-1. Stability depends on illumination and pH. Original Table 2/Molar Absorptivities describes separate wavelength-dependent measurements; the two reported maxima are not the two coefficients at a single common wavelength.