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