Using O=C(O)CI, CN1C(=O)C(NC(=O)c2cc3cc(O)ccc3[nH]2)N=C(c2ccccc2)c2ccccc21 to produce CN1C(=O)C(NC(=O)c2cc3cc(OCC(=O)O)ccc3[nH]2)N=C(c2ccccc2)c2ccccc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.