(E)-methyl 3-(1H-indol-2-yl)acrylate

(E)-3-(1H-indol-2-yl)acrylic acid

methyl 3-(2-(acetylindolyl))-2-propenoate

methyl 1-methyl-5H-pyrido[4,3-b]indole-3-carboxylate

methyl 3-<2-<3-<1-(hydroxyimino)ethyl>indolyl>>-2-propenoate