Using CCn1c2c(c3ccccc31)S(=O)(=O)N(CC(=O)OC)C2=O to produce CCn1c2c(c3ccccc31)S(=O)(=O)NC(C(=O)OC)=C2O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.