Using Cc1c(COc2cc(OCCC(C)(C)O)ccn2)nc2ccccc2c1OCc1ccccc1 to produce Cc1c(COc2cc(OCCC(C)(C)O)ccn2)[nH]c2ccccc2c1=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.