Using C=CCn1c(=O)c(C(=O)OC(C)(C)C)c(O)c2ccc(C)nc21 to produce C=CCn1c(=O)c(C(=O)O)c(O)c2ccc(C)nc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.