4-[2-(4-amino-1,2,5-oxadiazol-3-yl)-6-[(2R)-2-amino-3-phenylpropoxy]-1-ethylimidazo[4,5-c]pyridin-4-yl]-2-methylbut-3-yn-2-ol
4-[2-(4-amino-1,2,5-oxadiazol-3-yl)-6-[(2R)-2-amino-3-phenyl-propoxy]-1-ethyl-imidazo[4,5-c]pyridin-4-yl]-2-methyl-but-3-yn-2-ol
4-[2-(4-amino-1,2,5-oxadiazol-3-yl)-6-[(2R)-2-amino-3-phenylpropoxy]-1-ethyl-4-imidazo[4,5-c]pyridinyl]-2-methylbut-3-yn-2-ol
4-[2-(4-aminofurazan-3-yl)-6-[(2R)-2-amino-3-phenyl-propoxy]-1-ethyl-imidazo[4,5-c]pyridin-4-yl]-2-methyl-but-3-yn-2-ol