['NC1CCCC1', 'O=C/C=C/c1cc2ccccc2o1', 'C1CCCC1', 'NC(=O)/C=C/c1cc2ccccc2o1', 'CC(=O)NC1CCCC1', 'Cc1cc2ccccc2o1']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is O=C(/C=C/c1cc2ccccc2o1)NC1CCCC1.