['CC(N)=O', 'O=C1NC(=S)N/C1=C\\c1ccc(O)cc1', 'NC(=O)CO', 'O=C1NC(=S)N/C1=C\\c1ccccc1', 'O=C1CNC(=S)N1', 'Cc1ccc(OCC(N)=O)cc1']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is O=C1NC(=S)N/C1=C\c1ccccc1.