Download full text in PDF Opens in a new window. Article suggestions will be shown in a dialog on return to ScienceDirect. ... Please enable JavaScript to use all the features on this page. ... The structure of WF 3681 ( ), an aldose reductase inhibitor isolated from a Chaetomella species, has been determined on the basis of its physical and chemical properties and confirmed by a total synthesis. ... Structural elucidation of a fungal metabolite, WF3681 ( ) and ...