Using O=C(CCN1CCC2(CC1)OC(c1ccccc1)c1ccccc12)c1ccccc1 to produce OC(CCN1CCC2(CC1)OC(c1ccccc1)c1ccccc12)c1ccccc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.