Using C=CCBr, Oc1ccc(-c2nn3c(NC4CCCC4)cccc3c2-c2ccnc(NC3CCCC3)n2)cc1 to produce C=CCOc1ccc(-c2nn3c(NC4CCCC4)cccc3c2-c2ccnc(NC3CCCC3)n2)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.