Using CCCc1c(OCc2ccccc2)ccc2c1OC(C(=O)OC)CC2, CC(=O)c1ncc[nH]1 to produce CCCc1c(OCc2ccccc2)ccc2c1OC(C(C)=O)(C(=O)OC)CC2, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.