Using OC[C@H]1CC[C@H](n2cc3ccc(OCC4CC4)cc3n2)CC1 to produce O=C[C@H]1CC[C@H](n2cc3ccc(OCC4CC4)cc3n2)CC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.