Fig. 11 in Chemical evolution of the colour systems generated by riccionidin A, 3-deoxyanthocyanidins and anthocyanins

Fig. 11. (a) Chromatographic profile of trans-chalcone (4) in methanol:water 1:1 (0.5 mM, pH = 7.1) at 300 nm. a) freshly prepared; (b) after 4 days at r. t.; c) after 10 days at r. t. m/z = 301 (negative mode) for peaks 3, 4 and 7; m/z = 319 (negative mode) for peak 1; m/z = 337 (negative mode) for peak 2; m/z = 154 (negative mode) for peak 5; m/z = 617 (negative mode) peak 6.