['CCO', 'Cc1noc(C)c1CNC(=O)NCC=O', 'CCOC(=O)CN', 'Cc1noc(C)c1CNC=O', 'CCOC(=O)CNC=O', 'Cc1noc(C)c1CN', 'CC', 'Cc1noc(C)c1CNC(=O)NCC(=O)O', 'CCOC(C)=O', 'Cc1noc(C)c1CNC(N)=O', 'Cc1noc(C)c1C', 'CCOC(=O)CNC(N)=O', 'Cc1cc(C)on1', 'CCOC(=O)CNC(=O)NC']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is c1cnoc1.