Aurantioemestrin from Emericella striata and silvathione from Aspergillus silvaticus, possible key intermediates from epidithiodioxopiperazines to trioxopiperazines
Abstract
Two biogenetically possible key intermediates, from epidithiodioxopiperazines to trioxopiperazines, aurantioemestrin (1) and silvathione (2) were isolated from Emericella striata and Aspergillus silvaticus, respectively; their structure elucidation was based on their 1H and 13C n.m.r. spectra.