6-chloro-1-(2-methoxycarbonylvinyl)-1,3,4,9-tetrahydro-β-carboline-2-carboxylic acid tert-butyl ester

(E)-5-chloro-3-(2-nitroethenyl)-1H-indole

6-chloro-1-vinyl-2,3,4,9-tetrahydro-1H-β-carboline

6-chloro-2-tert-butyloxycarbonyl-1-vinyl-2,3,4,9-tetrahydro-1H-β-carboline

N-[2-(5-chloro-1H-indol-3-yl)ethyl]-4-nitrobenzenesulfonylamide