anthocyanidin 3,5-di-O-beta-D-glucoside betaine
anthocyanidin 3,5-di-o-beta-d-glucoside betaine
The oxonium betaine of anthocyanidin 3,5-di-<em>O</em>-β-<small>D</small>-glucoside arising from selective deprotonation of the 7-hydroxy group.