(2S)-2-aminochloranuidyl-2-(3-bromo-5-fluorophenyl)ethanol;4-[3-amino-6-[(1R,3S,4R)-3-fluoro-4-hydroxycyclohexyl]pyrazin-2-yl]-N-[(1S)-1-(3-bromo-5-fluorophenyl)-2-hydroxyethyl]-2-fluorobenzamide;4-[3-amino-6-[(1S,3R,4S)-3-fluoro-4-hydroxycyclohexyl]pyrazin-2-yl]-N-[(1S)-1-(3-bromo-5-fluorophenyl)-2-hydroxyethyl]-2-fluorobenzamide;4-[3-amino-6-[(1R,3S,4R)-3-fluoro-4-hydroxycyclohexyl]pyrazin-2-yl]-2-fluorobenzoic acid;4-[3-amino-6-[(1S,3R,4S)-3-fluoro-4-hydroxycyclohexyl]pyrazin-2-yl]-2-fluorobenzoic acid;bis(tert-butyl 4-[3-amino-6-[(1R,3S,4R)-3-fluoro-4-hydroxycyclohexyl]pyrazin-2-yl]-2-fluorobenzoate);tert-butyl 4-[3-amino-6-[(1S,3R,4S)-3-fluoro-4-hydroxycyclohexyl]pyrazin-2-yl]-2-fluorobenzoate;tert-butyl 4-[3-amino-6-[(1R,3S)-3-fluoro-4-oxocyclohexyl]pyrazin-2-yl]-2-fluorobenzoate