Figure 6: Time-course production of dipeptide Z-Ala-Phe-OMe and by-product (Z-Ala-Phe) in 50% (v/v) ethyl acetate, using (a) Z-Ala-pNo and (b) Z-Ala as carboxylic components and Phe-OMe as amino component. Xp represents the amount of product obtained as a function of the limiting reagent.