... 0 1994 American Chemical Society Page 2. Design and Synthesis of Constrained Phenylalanines ... Journal of Medicinal Chemistry, 1994, Vol. 37, No. 11 Phe HPh Met ne 1587 W CH3 1 (89.8 A') 2 (io6 A7 3 (73 A3) 4 (73 A3) Pen(S-Me) Pen(S02-Me) Dip m ...