(R)-3-methyl-2-(4'-vinyl-biphenyl-4-sulfonylamino)-butyric acid tert-butyl ester

(R)-3-Methyl-2-(2-nitro-biphenyl-4-sulfonylamino)-butyric acid tert-butyl ester

(R)-2-[(Biphenyl-4-sulfonyl)-pyridin-3-ylmethyl-amino]-3-methyl-butyric acid tert-butyl ester

D-2-[4'-(benzofuran-2-ylmethoxy)biphenyl-4-sulfonylamino]-3-methylbutyric acid tert-butyl ester

benzofuran-2-carboxylic acid 4'-(1-tert-butoxycarbonyl-2-methylpropylsulfamoyl)biphenyl-4-yl ester