['CO', 'CCN(C)C(=S)Nc1ccc2c(c1)OC(F)(F)O2', 'CCOC', 'CNC(=S)Nc1ccc2c(c1)OC(F)(F)O2', 'COCCN(C)C(N)=S', 'FC1(F)Oc2ccccc2O1']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is c1ccc2c(c1)OCO2.