Using COCCN, COCCn1c(Nc2nc3ccc(OC(F)(F)F)cc3s2)nc2cc(C(=O)O)ccc21 to produce COCCNC(=O)c1ccc2c(c1)nc(Nc1nc3ccc(OC(F)(F)F)cc3s1)n2CCOC, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.