Chemo- and Regiospecific Modification of d,l-Tryptophan by Reaction with α,β-Acetylenic γ-Hydroxy Nitriles - Trofimov, Boris A.; Mal’kina, Anastasiya G.; Borisova, Angela P.; Shemyakina, Olesya A.; Nosyreva, Valentina V.; Albanov, Alexander I. (Synthesis, 2010)