The fungal metabolite dihydrodeoxy-8-epi-austdiol, elaborated by Aspergillus ustus, has been identified as (7R,8R)-7,8-dihydro-7,8-dihydroxy-3,5,7-trimethyl-2-benzopyran-6-one. The absolute configuration of the azaphilones has been deduced.
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Steyn et al. (1976) studied this question.