[{"from": "human", "value": "Design a molecule that meets the criteria outlined in the description. The molecule is https://www.chemicalbook.com/ProductChemicalPropertiesCB9738874_EN.htm It has a role as a glycine receptor antagonist."}, {"from": "gpt", "value": "[C][O][C][=C][C][=Branch1][C][=O][O][C][Branch1][Ring2][C][Ring1][#Branch1][/C][=C][/C][=C][C][=C][C][=C][Ring1][=Branch1]"}]