S-Benzyl-N-carbobenzoxycysteinyltyrosyl Anilide.-From an aliquot of the solution theoretically containing 0.002 mole of azide and 0.188 g.(0.002 mole) of redistilled aniline, there was obtained, after standing overnight at room temperature, a crude solid product. This was recrystallized from ethyl acetate to give 0.7 g.(60%) of a crystalline solid,