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