[{"from": "human", "value": "Provide a brief overview of this molecule. [C][C@H1][C@@H1][Branch2][Branch2][#Branch1][N][C][=Branch1][C][=O][C@@H1][Branch2][#Branch1][Branch1][N][C][=Branch1][C][=O][C@H1][Branch2][=Branch1][O][C@@H1][Branch2][=Branch1][C][N][C][=Branch1][C][=O][C@@H1][Branch2][Ring2][=N][N][C][=Branch1][C][=O][C@H1][Branch2][Ring2][Ring1][N][C][=Branch1][C][=O][C][=Branch1][C][=C][N][Branch2][Ring1][Branch1][C][=Branch1][C][=O][C][C][C@@H1][Branch1][#Branch1][N][C][Ring2][Ring1][S][=O][C][=Branch1][C][=O][O][C][C][C][C][=C][C][=C][Branch1][Branch1][C][=C][Ring1][=Branch1][O][C][=Branch1][C][=O][O][C][C][C][C][N][=C][Branch1][C][N][N][/C][=C][/C][=Branch2][Ring1][Ring2][=C][/C@H1][Branch1][C][C][C@H1][Branch1][#Branch2][C][C][=C][C][=C][C][=C][Ring1][=Branch1][O][C][/C]"}, {"from": "gpt", "value": "The molecule is one of over 80 types of microcystins, cyclic heptapeptides that have been shown to be liver toxins, and which are produced by <i>Microcystis</i> species. Microcystins are chemically stable over a wide range of temperature and pH, possibly as a result of their cyclic structure. The toxins are also resistant to enzymatic hydrolysis (in guts of animals) by some general proteases, such as pepsin, trypsin, collagenase, and chymotrypsin."}]