... Res. 1982,2, 407. (d) Cromlish, J. A,; Flynn, T. G. J. Neuro- chem. 1985, 44, 1485. 0022-2623/91/1834-1011$02.50/0 0 1991 American Chemical Society Page 2. Mylari et ai. 1012 Journal of Medicinal Chemistry, 1991, Vol. 34, No. 3 Scheme I Scheme I1 Scheme I11 ...