['CS(=O)(=O)NCC=O', 'c1ccc(C2CNCc3ccccc32)cc1', 'CS(N)(=O)=O', 'CC(=O)N1Cc2ccccc2C(c2ccccc2)C1', 'C[SH](=O)=O', 'NCC(=O)N1Cc2ccccc2C(c2ccccc2)C1']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is c1ccc(C2CNCc3ccccc32)cc1.