['CCO', 'C/C(=C\\C=O)NC(=O)Oc1ccccc1', 'Oc1ccccc1', 'CCOC(=O)/C=C(\\C)NC=O', 'O=COc1ccccc1', 'CCOC(=O)/C=C(\\C)N', 'CC', 'C/C(=C\\C(=O)O)NC(=O)Oc1ccccc1', 'c1ccccc1', 'CCOC(=O)/C=C(\\C)NC(=O)O', 'CCOC(C)=O', 'CCNC(=O)Oc1ccccc1']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is c1ccccc1.