Using CC(C)(C)OC(=O)NCC(=O)O, COc1ccc(-c2cc(=O)[nH]c(=S)n2CCN)c(OC)c1 to produce COc1ccc(-c2cc(=O)[nH]c(=S)n2CCNC(=O)CNC(=O)OC(C)(C)C)c(OC)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.