(E)-3-(1H-Indol-3-yl)-2-propenoic acid 2-(4-morpholinyl)ethyl ester ethanedioate (1:1) 2-Propenoic acid, 3-(1H-indol-3-yl)-, 2-(4-morpholinyl)ethyl ester, (E)-, ethanedioate (1:1) 70882-60-9 beta-Morpholinoethyl trans-beta-(3-indolyl)acrylate oxalate