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Ultraviolet–Visible Excitation of cis- and trans-p-Coumaric Acylated Delphinidins and Their Resulting Photochromic Characteristics

See http://tny.im/s8c — Anthocyanins are often acylated with trans-hydroxycinnamic acids but can undergo a structural transformation to their cis-isomer. This study investigated the reversible photochromism of trans- and cis-acylated delphinidin derivatives (Dp) under industry-accessible ultraviolet (UV) and visible energies and their impact on color expression. Delphinidin-3-(trans-p-coumaroyl)-rutinoside-5-glucoside, delphinidin-3-(cis-p-coumaroyl)-rutinoside-5-glucoside, and its mixture were subjected to UV and…

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