Averufin, Versicolorin A and their Relation to Aflatoxin

The theory of terpene biosynthesis was confirmed by 13C NMR measurements on derivatives of the diterpenic compounds virescenoside A and B isolated from cultures of the mushroom Oospora virescens (Link) Wallr. inoculated with [l-13C]-acetate and [2-13C]-acetate [1010]. 

Measurements on these 13C-enriched compounds and the application of common assignment aids [73] led to the total signal identification of the following diterpenes the 13C shifts are outlined in Table 5.42. 

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