Using CCOC(=O)c1nc(-c2ccc3c(c2)N(C(C)=O)CCC3)sc1-c1ccc(OC)cc1 to produce COc1ccc(-c2sc(-c3ccc4c(c3)NCCC4)nc2C(=O)O)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.