Using CC(=O)O, Nc1c(I)c(C(=O)O)c(I)c(C(=O)NC(CO)(CO)CO)c1I to produce CC(=O)OCC(COC(C)=O)(COC(C)=O)NC(=O)c1c(I)c(N)c(I)c(C(=O)O)c1I, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.