methyl (1R,2S,3R,5S)-3-(3-fluoro-4-methylphenyl)-8-azabicyclo[3.2.1]octane-2-carboxylate methyl (1R,2S,3R,5S)-3-(3-fluoro-4-methyl-phenyl)-8-azabicyclo[3.2.1]octane-2-carboxylate (1R,2S,3R,5S)-3-(3-fluoro-4-methylphenyl)-8-azabicyclo[3.2.1]octane-2-carboxylic acid methyl ester (1R,2S,3R,5S)-3-(3-fluoro-4-methyl-phenyl)-8-azabicyclo[3.2.1]octane-2-carboxylic acid methyl ester