1-[(2,6-difluorophenyl)methyl]-3-[(2S)-2-dimethylamino-4-methylpentyl]-5-(2-fluoro-3-methoxyphenyl)-6-methylpyrimidine-2,4-dione 1-[(2,6-difluorophenyl)methyl]-3-[(2S)-2-dimethylamino-4-methyl-pentyl]-5-(2-fluoro-3-methoxy-phenyl)-6-methyl-pyrimidine-2,4-dione 1-(2,6-difluorobenzyl)-3-[(2S)-2-dimethylamino-4-methyl-pentyl]-5-(2-fluoro-3-methoxy-phenyl)-6-methyl-pyrimidine-2,4-quinone