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