[{"from": "human", "value": "Could you provide a description of this molecule? [C@@H1][Branch2][Ring1][#Branch1][C@H1][Branch2][Ring1][C][C@H1][Branch1][#Branch2][O][C@H1][Branch1][Branch1][C@@H1][Ring1][=Branch1][O][O][C][=Branch1][C][=O][O][O][O]"}, {"from": "gpt", "value": "The molecule is a heteropolysaccharide commercially derived from the cell wall of higher plants. It is composed of partially methylated polygalacturonic acid units linked in the positions 1-4. The carboxylic group of the constituents of pectin can exist in the form of esters, free acids, ammonium, potassium or sodium salts or as acid amides. Under the FDA regulation, pectin qualifies as a GRAS (generally recognized as safe) food substance. This status allows pectin to be used with no limitations."}]