Sodium;3-bromo-2-methylthiophene;5-chlorylsulfanyl-2-methyl-3-[4-(trifluoromethoxy)phenyl]thiophene;2-[3-ethoxy-5-[4-[4-(trifluoromethoxy)phenyl]thiophen-2-yl]sulfonylphenyl]acetic acid;methyl 2-[3-ethoxy-5-[5-methyl-4-[4-(trifluoromethoxy)phenyl]thiophen-2-yl]sulfonylphenyl]acetate;methyl 2-[3-ethoxy-5-(trifluoromethylsulfonyloxy)phenyl]acetate;2-methyl-5-oxidooxysulfanyl-3-[4-(trifluoromethoxy)phenyl]thiophene;2-methyl-3-[4-(trifluoromethoxy)phenyl]thiophene