(E)-3-(4-((methylsulfonyl)oxy)-2-nitrophenyl)allyl acetate

tert-butyl 3-(2-acetoxyethyl)-2-iodo-6-((methylsulfonyl)oxy)-1H-indole-1-carboxylate

3-(2-hydroxyethyl)-6-methanesulfonyloxy-2-(1-methoxycarbonylvinyl)indole-1-carboxylic acid tert-butyl ester

methyl 2-(3-(2-((((2S)-4-ethyl-5-hydroxytetrahydrofuran-2-yl)methyl)amino)ethyl)-6-((methylsulfonyl)oxy)-1H-indol-2-yl)acrylate

(5R,7S,12R,19S)-2,3-didehydro-7-hydroxy-16-[(methanesulfonyl)oxy]aspidospermidine-3-carboxylic acid methyl ester