2-(2-(4-((2-Cyanoethyl)methylamino)phenyl)vinyl)-1,3,3-trimethyl-3H-indolium hydrogen sulphate 3H-Indolium, 2-(2-(4-((2-cyanoethyl)methylamino)phenyl)ethenyl)-1,3,3-trimethyl-, sulfate (1:1) 72319-18-7 EINECS 276-586-9