Using CCOC(=O)CC[C@H](NC(=O)c1ccc(CCCc2cc3c(=O)[nH]c(N)nc3[nH]2)s1)C(=O)OCC to produce Nc1nc2[nH]c(CCCc3ccc(C(=O)N[C@@H](CCC(=O)O)C(=O)O)s3)cc2c(=O)[nH]1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.