Using O=c1[nH]c2c(F)cccc2c(=O)n1-c1cccc(Br)c1Cl, CN(C)C=O to produce Cn1c(=O)n(-c2cccc(Br)c2Cl)c(=O)c2cccc(F)c21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.