Using C=CCOc1ccccc1OCC(O)CN1CCC(O)(c2cccc3[nH]ccc23)CC1 to produce C=CCOc1ccccc1OCC(O)CN1CC=C(c2cccc3[nH]ccc23)CC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.