['CO', 'Cc1ccc(C(=O)NCC(=O)N(C)CC(C)C=O)s1', 'CNCC(C)C(=O)OC', 'Cc1ccc(C(=O)NCC=O)s1', 'Cc1ccc(C=O)s1', 'COC(=O)C(C)CN(C)C(=O)CN', 'COC(=O)C(C)C', 'CNC(=O)CNC(=O)c1ccc(C)s1', 'Cc1ccc(C(N)=O)s1', 'COC(=O)C(C)CN(C)C(C)=O', 'Cc1cccs1', 'COC(=O)C(C)CN(C)C(=O)CNC=O']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is c1ccsc1.