1983 Volume 31 Issue 1 Pages 20-24
Mutaaspergillic and dl-hydroxyaspergillic acids, metabolites of aspergilli, were prepared by base-catalyzed hydroxylation of the corresponding 2-chloro-3, 6-dialkylpyrazine 1-oxides derived from DL-leucyl-valyl and DL-isoleucyl-leucyl anhydrides.