[{"from": "human", "value": "Provide a description of this molecule. [C][=C][C][=C][Branch1][Branch1][C][=C][Ring1][=Branch1][C][=O+1][C][=C][C][=C][C][=C][Ring1][=Branch1][C][=C][Ring1][#Branch2]"}, {"from": "gpt", "value": "The molecule is a flavonoid that is a glycoside derivative of anthocyanidin. They are water-soluble plant pigments that exhibit bright coloration. Their color is dependent on the pH of the solvent; therefore, these polyphenols are used as pH indicators."}]