Using COc1ccc(Oc2ccc3c(c2)CCN(C2CCC2)CC3)cn1 to produce O=c1ccc(Oc2ccc3c(c2)CCN(C2CCC2)CC3)c[nH]1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.