Using CCOC(=O)CC(=O)Cc1ccc2c(C(=O)OC)cccc2c1, NC(N)=S to produce O=C(O)c1cccc2cc(Cc3cc(=O)[nH]c(=S)[nH]3)ccc12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.