['C[C@@H]1[C@H](C)CCC[C@@H]1N', 'O=CCc1ccc2ccccc2c1', 'C[C@@H]1CCCC[C@@H]1C', 'NC(=O)Cc1ccc2ccccc2c1', 'c1ccc2ccccc2c1', 'CC(=O)N[C@H]1CCC[C@@H](C)[C@H]1C']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is O=C(Cc1ccc2ccccc2c1)NC1CCCCC1.