Using CCCCCC=Cc1cccc2c(=O)[nH]c(-c3ccccc3OCCC)nc12 to produce CCCCCCCc1cccc2c(=O)[nH]c(-c3ccccc3OCCC)nc12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.