Smith A B, Hirschmann R, Pasternak A, Yao W, Sprengeler P A, Holloway M K, Kuo L C, Chen Z, Darke P L, Schleif W A
Department of Chemistry, University of Pennsylvania, Philadelphia 19104, USA.
J Med Chem. 1997 Aug 1;40(16):2440-4. doi: 10.1021/jm970195u.