['CC(C)[C@H](CN)N(C)C', 'O=CNCc1ccc(OC(F)F)cc1', 'CC(C)[C@H](CNC=O)N(C)C', 'NCc1ccc(OC(F)F)cc1', 'OC(F)F', 'CC(C)[C@H](CNC(=O)NCc1ccccc1)N(C)C', 'CNC', 'CC(C)CCNC(=O)NCc1ccc(OC(F)F)cc1', 'CC(C)[C@H](C)N(C)C', 'NC(=O)NCc1ccc(OC(F)F)cc1', 'Cc1ccc(OC(F)F)cc1', 'CC(C)[C@H](CNC(N)=O)N(C)C', 'FC(F)Oc1ccccc1', 'CNC(=O)NC[C@@H](C(C)C)N(C)C']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is c1ccccc1.