Using CC(C)(C)c1cc(C(O)CN)cc(C(C)(C)C)c1O, COC(=O)Cc1ccc(OCC(C)=O)cc1 to produce COC(=O)Cc1ccc(OCC(C)NCC(O)c2cc(C(C)(C)C)c(O)c(C(C)(C)C)c2)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.