Fig. 8. Stochastic kinetic simulations for the yield of diketopiperazine 5. S1 (green line, k₆ ≫ k₅ = 0.0412 min⁻¹); S2 (dashed red line, k₆ ≫ k₅ = 1.44 min⁻¹); S3 (dotted blue line, k₅ = k₆ = 0.483 min⁻¹); Expt 1 (purple circles); Expt 2 (black triangles).