2-Amino-3-((N-2,4,6-trimethylbenzenesulfonyl)indole)propionic acid 92916-45-5 L-Tryptophan, 1-((2,4,6-trimethylphenyl)sulfonyl)-, (11beta,17alpha)- Mts-tryptophan N-Mesitylenesulfonyltryptophan