['CN', 'Cc1cc(S[C@@H](C)C=O)nc2ccccc12', 'CCC(=O)NC', 'Cc1cc(S)nc2ccccc12', 'CNC(=O)[C@H](C)S', 'Cc1ccnc2ccccc12']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is c1ccc2ncccc2c1.