Using CCc1cc2c(OCC(=O)OC)nc(SC)nc2n1Cc1cccc(F)c1 to produce CCc1cc2c(OCC(=O)OC)ncnc2n1Cc1cccc(F)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.