Using OB(O)c1ccco1, CC(C)NCCCn1c(Sc2cc3c(cc2I)OCO3)nc2c(N)ncnc21 to produce CC(C)NCCCn1c(Sc2cc3c(cc2-c2ccco2)OCO3)nc2c(N)ncnc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.