tert-butyl (R)-{3-[2-(benzyloxy)-4-oxo-4,5-dihydrofuran-3-yl]-1-methyl-2-oxoindolin-3-yl}carbamate
(R,E)-tert-butyl (3-cinnamoyl-1-methyl-2-oxoindolin-3-yl)carbamate
(R,E)-tert-butyl (3-(3-(4-bromophenyl)acryloyl)-1-methyl-2-oxoindolin-3-yl)carbamate
(R,E)-tert-butyl (3-(3-(4-chlorophenyl)acryloyl)-1-methyl-2-oxoindolin-3-yl)carbamate
(R,E)-tert-butyl (3-(3-(3-fluorophenyl)acryloyl)-1-methyl-2-oxoindolin-3-yl)carbamate