Using CCc1c(-c2ccc(OC)cc2)c2c(C(=O)O)c(C(=O)O)c3cc(OC)cc1n32 to produce CCc1c(-c2ccc(OC)cc2)c2ccc3cc(OC)cc1n32, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.