[{"from": "human", "value": "Provide a description of this molecule. [C][C][=C][Branch2][Ring1][Ring1][C][=C][C][=Branch1][Ring2][=C][Ring1][=Branch1][C][=N][O][C][=Branch1][Ring2][=N][Ring1][Branch1][C][C][=C][C][=C][Branch1][Branch1][C][=C][Ring1][=Branch1][C][=Branch1][C][=O][N][C][=C][C][=Branch1][#Branch2][=C][Branch1][Branch1][C][=C][Ring1][=Branch1][O][C][N][C][C][N][Branch1][Branch1][C][C][Ring1][=Branch1][C].[Cl]"}, {"from": "gpt", "value": "The molecule is a hydrochloride obtained by reaction of GR 127935 with one equivalent of hydrochloric acid. Potent and selective 5-HT1B/1D receptor antagonist (pKi values are 8.5 for both guinea pig 5-HT1D and rat 5-HT1B receptors). Displays > 100-fold selectivity over 5HT1A, 5-HT2A, 5-HT2C receptors and other receptor types. Centrally active following oral administration. It has a role as a serotonergic antagonist. It contains a GR 127935(1+)."}]