4-Hydroxy-1-(4-hydroxy-3,7-dimethoxy-17-methyl-6-oxo-7,8-didehydromorphinan-1-yl)-3,7-dimethoxy-17-methyl-7,8-didehydromorphinan-6-one 70680-99-8 AIDS-160179 AIDS160179 NSC294391 NSC298228