['CC(C)(C)N', 'CCN(CC=O)C(=O)/C=C/c1cccc(OC)c1OC(F)F', 'CCNCC(=O)NC(C)(C)C', 'COc1cccc(/C=C/C=O)c1OC(F)F', 'CO', 'CCN(CC(=O)NC(C)(C)C)C(=O)/C=C/c1ccccc1OC(F)F', 'OC(F)F', 'CCN(CC(=O)NC(C)(C)C)C(=O)/C=C/c1cccc(OC)c1', 'CC', 'COc1cccc(/C=C/C(=O)NCC(=O)NC(C)(C)C)c1OC(F)F', 'CC(=O)NC(C)(C)C', 'CCNC(=O)/C=C/c1cccc(OC)c1OC(F)F', 'CC(C)C', 'CCN(CC(N)=O)C(=O)/C=C/c1cccc(OC)c1OC(F)F', 'COc1cccc(C)c1OC(F)F', 'CCN(CC(=O)NC(C)(C)C)C(C)=O']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is c1ccccc1.