Page 1. SYNTHETIC COMMUNICATIONS, 28( 14), 2571-2576 (1998) A CONVENIENT ROUTE TO CONDENSED-RING ... 2571 Copyright 0 1998 by Marcel Dekker, Inc. www .dekker .corn ... Interact. 1994, 93, 1-10, Roberts, ES; Ballou, D. P.; Hopkins, N. E.; Alworth, W. L. and ...