['CCO', 'CC[C@]1(C=O)CNc2ccccc2C1', 'CC', 'CC[C@]1(C(=O)O)CNc2ccccc2C1', 'CCOC=O', 'CC[C@H]1CNc2ccccc2C1', 'CC', 'CCOC(=O)[C@@H]1CNc2ccccc2C1']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is c1ccc2c(c1)CCCN2.