Using COc1cc2c(ccn2S(=O)(=O)c2ccccc2)c2c1OCCN=C2C to produce COc1cc2c(ccn2S(=O)(=O)c2ccccc2)c2c1OCCNC2C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.