['COCCOCCN', 'Cc1ccc(O)c(C=O)c1', 'CO', 'CCOCCNC(=O)c1cc(C)ccc1O', 'CCOC', 'Cc1ccc(O)c(C(=O)NCCO)c1', 'COCCO', 'CCNC(=O)c1cc(C)ccc1O', 'CCOCCOC', 'Cc1ccc(O)c(C(N)=O)c1', 'Cc1ccc(O)cc1', 'COCCOCCNC=O']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is c1ccccc1.