['COCCCCN', 'Cc1noc(C)c1CNC=O', 'COCCCCNC=O', 'Cc1noc(C)c1CN', 'CO', 'CCCCNC(=O)NCc1c(C)noc1C', 'CCCCOC', 'Cc1noc(C)c1CNC(N)=O', 'Cc1noc(C)c1C', 'COCCCCNC(N)=O', 'Cc1cc(C)on1', 'CNC(=O)NCCCCOC']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is c1cnoc1.