['NC(=O)NCc1ccco1', 'CC(C)CN(CC=O)CC(C)C', 'O=CNCc1ccco1', 'CC(C)CN(CC(N)=O)CC(C)C', 'NCc1ccco1', 'CC(C)CN(CC(=O)NC=O)CC(C)C', 'CC(C)C', 'CC(C)CNCC(=O)NC(=O)NCc1ccco1', 'CC(C)CNCC(C)C', 'CC(=O)NC(=O)NCc1ccco1', 'Cc1ccco1', 'CC(C)CN(CC(=O)NC(N)=O)CC(C)C', 'c1ccoc1', 'CNC(=O)NC(=O)CN(CC(C)C)CC(C)C']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is c1ccoc1.