[{"from": "human", "value": "What can you tell me about this molecule? [C][C][=Branch2][Ring1][C][=C][Branch1][=C][C][=Branch1][C][=O][C][C@][Ring1][#Branch1][Branch1][Ring1][C][O][O][O-1][O]"}, {"from": "gpt", "value": "The molecule is an organic anion obtained by deprotonation of one of the hydroxy groups of (S)-demethyl-4-deoxygadusol. It is the major microspecies at pH 7.3 (according to Marvin v 6.2.0.). It is a conjugate base of a (S)-demethyl-4-deoxygadusol."}]