['OCCO', 'Cc1nn(Cc2ccc(Cl)cc2)c(Cl)c1/C=C/C=O', 'CCO', 'Cc1nn(Cc2ccc(Cl)cc2)c(Cl)c1/C=C/C(=O)O', 'CC(=O)OCCO', 'Cc1nn(Cc2ccc(Cl)cc2)c(Cl)c1C', 'Cc1ccc(Cl)cc1', 'Cc1n[nH]c(Cl)c1/C=C/C(=O)OCCO', 'Clc1ccccc1', 'Cc1nn(C)c(Cl)c1/C=C/C(=O)OCCO']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is c1ccc(Cn2cccn2)cc1.