YAV yav 2-[2-[2-[3-[2-[2-[2-[[3-[2-[3-(2-hydroxy-2-oxoethyl)-5-methyl-1-benzofuran-2-yl]ethynyl]phenyl]carbonylamino]ethoxy]ethoxy]ethylcarbamoyl]phenyl]ethynyl]-5-methyl-1-benzofuran-3-yl]ethanoic acid YAV