['CCO', 'CN(CC=O)C(=O)Nc1ccc(C#N)cc1', 'CCOC(=O)CNC', 'N#Cc1ccc(NC=O)cc1', 'N#Cc1ccc(N)cc1', 'CCOC(=O)CN(C)C=O', 'CC', 'CN(CC(=O)O)C(=O)Nc1ccc(C#N)cc1', 'CCOC(C)=O', 'CNC(=O)Nc1ccc(C#N)cc1', 'N#Cc1ccccc1', 'CCOC(=O)CN(C)C(N)=O']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is c1ccccc1.