Using CC[C@H](C)[C@H](NC(=O)OC(C)(C)C)C(=O)O, CCCCCCCCCCCCCCCCCC(=O)OC[C@H](CCO)Cn1cnc2c(=O)[nH]c(N)nc21 to produce CCCCCCCCCCCCCCCCCC(=O)OC[C@H](CCOC(=O)[C@@H](NC(=O)OC(C)(C)C)[C@@H](C)CC)Cn1cnc2c(=O)[nH]c(N)nc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.