[{"from": "human", "value": "What can you tell me about this molecule? [C][C][=N][C][=Branch1][=Branch1][=C][C][=C][Ring1][=Branch1][C][#C][C][=C][C][=C][C][=C][Ring1][=Branch1].[Cl]"}, {"from": "gpt", "value": "The molecule is a hydrochloride salt obtained by reaction of 2-methyl-6-(phenylethynyl)pyridine with one equivalent of hydrochloric acid. Potent and highly selective non-competitive antagonist at the mGlu5 receptor subtype (IC50 = 36 nM) and a positive allosteric modulator at mGlu4 receptors. Centrally active following systemic administration in vivo. Reverses mechanical hyperalgesia in the inflamed rat hind paw. It has a role as a metabotropic glutamate receptor antagonist and an anxiolytic drug. It contains a 2-methyl-6-(phenylethynyl)pyridinium(1+)."}]