Using CCn1cc(NC(=O)Cc2ccc(Oc3ccnc4cc(OC)c(C(=O)OC)cc34)cc2)cn1 to produce CCn1cc(NC(=O)Cc2ccc(Oc3ccnc4cc(OC)c(C(=O)O)cc34)cc2)cn1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.