SMILES: C1=C(O[C@H]([C@@H]([C@H]1O)O)O[C@@H]2[C@@H]([C@H](C(O[C@@H]2C(=O)O)O)O)O)C(=O)O
Description: The molecule is a D-galacturonic acid having a 4-deoxy-alpha-L-threo-hex-4-enopyranosyluronic acid moiety attached at the 4-position. It is a conjugate acid of a 4-(4-deoxy-beta-D-gluc-4-enosyluronate)-D-galacturonate(2-).