Using COc1cc(Nc2cc3c(cc2Nc2ccccc2)C(=O)NC3=O)cc(OC)c1OC to produce O=C1NC(=O)c2cc(Nc3cc(O)c(O)c(O)c3)c(Nc3ccccc3)cc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.