Studies on WB-3559 A, B, C and D, new potent fibrinolytic agents. II. Structure elucidation and synthesis

The structures of WB-3559 A, B, C and D, new fibrinolytic agents isolated from Flavobacterium sp. No. 3559, have been elucidated to be as shown in 1, 2, 3 and 4, respectively, on the basis of chemical and spectroscopic evidence. Total synthesis of WB-3559 D (4) was achieved starting from the optically active aldehyde 14.