Using O=C(OCc1ccccc1)OC1CCc2[nH]cc3c(=O)n(-c4ccc(Cl)cc4)nc-3c2C1 to produce O=c1c2c[nH]c3c(c-2nn1-c1ccc(Cl)cc1)CC(O)CC3, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.