['CC(C)COCC(O)CN', 'O=CNC1CC1c1ccccc1', 'NC1CC1c1ccccc1', 'CC(C)COCC(O)CNC=O', 'CC(C)C', 'O=C(NCC(O)CO)NC1CC1c1ccccc1', 'CC(C)CO', 'CC(O)CNC(=O)NC1CC1c1ccccc1', 'CC(C)COCC(C)O', 'NC(=O)NC1CC1c1ccccc1', 'c1ccc(C2CC2)cc1', 'CC(C)COCC(O)CNC(N)=O', 'c1ccccc1', 'CC(C)COCC(O)CNC(=O)NC1CC1']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is c1ccc(C2CC2)cc1.