Using CC(CO)(CO)COC(=O)Cc1ccc(-c2ccnc(Nc3cccc(CO)c3)n2)s1 to produce O=C(O)Cc1ccc(-c2ccnc(Nc3cccc(CO)c3)n2)s1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.