Using Cc1cn(-c2ccc3c(N)ncnc3c2F)c2c1C(=O)CC(C)(C)C2, COCCN to produce COCCNc1c(-n2cc(C)c3c2CC(C)(C)CC3=O)ccc2c(N)ncnc12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.