Using CCOC(=O)CBr, Cc1c(SCCCNCc2ccccc2)ccnc1CSc1nc2ccccc2[nH]1 to produce CCOC(=O)CN(CCCSc1ccnc(CSc2nc3ccccc3[nH]2)c1C)Cc1ccccc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.