2-[4-[2-[(2,4-difluorophenyl)carbamoyl-heptylamino]ethyl]phenyl]sulfanyl-2-methylpropanoic acid 2-[4-[2-[(2,4-difluorophenyl)carbamoyl-heptyl-amino]ethyl]phenyl]sulfanyl-2-methyl-propanoic acid 2-[[4-[2-[[[(2,4-difluorophenyl)amino]-oxomethyl]-heptylamino]ethyl]phenyl]thio]-2-methylpropanoic acid 2-[[4-[2-[(2,4-difluorophenyl)carbamoyl-heptyl-amino]ethyl]phenyl]thio]-2-methyl-propionic acid GW-9578