N-Boc indole-3-butyric acid

(R)-1-(tert-butoxycarbonyl)-2-(hydroxymethyl)pyrrolidine-2-carboxylic acid

tert-butyl 5-nitro-2,3-dihydro-1H-indole-1-carboxylate

1,1-dimethylethyl 3-oxo-4-morpholinecarboxylate

tert-butyl (2-(4-acetamidobenzamido)phenyl)carbamate