Using COC(=O)Cc1cc(=O)c2c(OC)cccc2[nH]1, COS(=O)(=O)OC to produce COc1cccc2c1c(=O)cc(CC(=O)O)n2C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.