[{"from": "human", "value": "Based on the given information, design a molecule that meets the desired specifications. The molecule is a member of the class of barbiturates that is pyrimidine-2,4,6(1H,3H,5H)-trione substituted by a 3-methylbutyl and an ethyl group at position 5. Amobarbital has been shown to exhibit sedative and hypnotic properties."}, {"from": "gpt", "value": "[C][C][C][Branch1][#C][C][=Branch1][C][=O][N][C][=Branch1][C][=O][N][C][Ring1][Branch2][=O][C][C][C][Branch1][C][C][C]"}]