Using CCCc1c(Cc2ccc(-c3ccccc3C#N)cc2)c(=O)n(C2CCNCC2)c2ncnn12, OCCBr to produce CCCc1c(Cc2ccc(-c3ccccc3C#N)cc2)c(=O)n(C2CCN(CCO)CC2)c2ncnn12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.