Using CC(C)(C)OC(=O)N[C@@H](CO)C(=O)O, C=CCOC(=O)c1cccc(CI)c1 to produce C=CCOC(=O)c1cccc(COC[C@H](NC(=O)OC(C)(C)C)C(=O)O)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.