['CC(C)OCCCN', 'CC(C=O)Oc1cccc(C#N)c1', 'CCC', 'CC(Oc1cccc(C#N)c1)C(=O)NCCCO', 'CC(C)O', 'CCCNC(=O)C(C)Oc1cccc(C#N)c1', 'N#Cc1cccc(O)c1', 'CCC(=O)NCCCOC(C)C', 'N#Cc1ccccc1', 'CC(C)OCCCNC(=O)C(C)O', 'CCCOC(C)C', 'CC(Oc1cccc(C#N)c1)C(N)=O']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is c1ccccc1.