[{"from": "human", "value": "Based on the given information, design a molecule that meets the desired specifications. The molecule is an epoxide-containing cyclotetrapeptide with antitumor activity.  It is an irreversible inhibitor of histone deacetylase."}, {"from": "gpt", "value": "[C][C][C][N][C@H1][Branch1][Ring2][C][Ring1][=Branch1][C][=Branch1][C][=O][N][C@H1][Branch2][Ring2][Branch2][C][=Branch1][C][=O][N][C@H1][Branch2][Ring1][=Branch1][C][=Branch1][C][=O][N][C@H1][Branch1][Branch1][C][Ring1][S][=O][C][C][=C][C][=C][C][=C][Ring1][=Branch1][C][C][=C][C][=C][C][=C][Ring1][=Branch1][C][C][C][C][C][C][=Branch1][C][=O][C@@H1][C][O][Ring1][Ring1]"}]