(R)-N-(1-(3-(2-hydroxyethyl)-1-tosyl-1H-indol-4-yl)-3-methylbut-2-en-1-yl)-2-nitrobenzenesulfonamide

(R)-4-azido-2-methyl-4-(1-tosyl-1H-indol-4-yl)butan-2-ol

(R)-N-(3-hydroxy-3-methyl-1-(1-tosyl-1H-indol-4-yl)butyl)-2-nitrobenzenesulfonamide

(R)-N-(1-(3-bromo-1-tosyl-1H-indol-4-yl)-3-hydroxy-3-methylbutyl)-2-nitrobenzenesulfonamide

(R)-N-(3-hydroxy-3-methyl-1-(1-tosyl-3-vinyl-1H-indol-4-yl)butyl)-2-nitrobenzenesulfonamide