['CNC(=O)[C@@H](C)O', 'CSCc1c(C=O)oc2ccccc12', 'CN', 'CSCc1c(C(=O)O[C@H](C)C=O)oc2ccccc12', 'CCC(=O)NC', 'CSCc1c(C(=O)O)oc2ccccc12', 'CS', 'CNC(=O)[C@@H](C)OC(=O)c1oc2ccccc2c1C', 'CNC(=O)[C@@H](C)OC=O', 'CSCc1coc2ccccc12', 'CSC', 'CNC(=O)[C@@H](C)OC(=O)c1cc2ccccc2o1']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is c1ccc2occc2c1.