[{"from": "human", "value": "Generate a molecule based on the given description. The molecule is a member of the class of barbiturates that is pyrimidine-2,4,6(1H,3H,5H)-trione substituted by an isopropyl and a prop-1-en-3-yl group at position 5."}, {"from": "gpt", "value": "[C][C][Branch1][C][C][C][Branch1][#C][C][=Branch1][C][=O][N][C][=Branch1][C][=O][N][C][Ring1][Branch2][=O][C][C][=C]"}]