Using CCOC(=O)c1nc(C2(NC(=O)OCc3ccccc3)CCC3(CC2)OCCO3)[nH]c(=O)c1O to produce CCOC(=O)c1nc(C2(NC(=O)OCc3ccccc3)CCC(=O)CC2)[nH]c(=O)c1O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.