Using CCCc1nc2c(N)nc3cc(C=Cc4cccnc4)ccc3c2n1NC(C)C to produce CCCc1nc2c(N)nc3cc(CCc4cccnc4)ccc3c2n1NC(C)C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.