Using CCOC(=O)C[C@@H]1CCc2cc(OCCCOc3ccc(-c4nc5c(s4)CCCC5)cc3OC)ccc21 to produce CCOC(=O)C[C@@H]1CCc2cc(OCCCOc3ccc(-c4nc5c(s4)CCCC5)cc3O)ccc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.