(2R)-1-[4-[(4-fluoro-2-methyl-1H-indol-5-yl)oxy]-5-methylpyrrolo[5,1-f][1,2,4]triazin-6-yl]oxypropan-2-ol (2R)-1-[4-[(4-fluoro-2-methyl-1H-indol-5-yl)oxy]-5-methyl-pyrrolo[5,1-f][1,2,4]triazin-6-yl]oxypropan-2-ol (2R)-1-[[4-[(4-fluoro-2-methyl-1H-indol-5-yl)oxy]-5-methyl-6-pyrrolo[5,1-f][1,2,4]triazinyl]oxy]propan-2-ol