1 5U6 4-[4-[(dimethylamino)methyl]-2,5-dimethoxy-phenyl]-2-methyl-2,7-naphthyridin-1-one 1.000 2 5SW 4-[4-[(dimethylamino)methyl]-3,5-dimethoxy-phenyl]-2-methyl-2,7-naphthyridin-1-one 0.857