A diarrheagenic toxin from culture extracts of Aspergillus wentii Wehmer isolated from weevil-damaged Chinese chestnuts was identified as emodin (2-methyl-4,5,7-trihydroxyanthraquinone). The orange-red, crystalline toxin (mp 255 to 257 C) showed ultraviolet absorption maxima in ethyl alcohol at 223, 250, 267, 290, and 442 nm, and infrared absorption maxima at 3,400 cm-1 (OH), 1,635, and 1,625 cm-1. Chemical shifts and coupling constants of the proton magnetic resonance spectra of the A. wentii toxin and of authentic emodin agreed. Mean lethal dose of emodin orally administered to 1 day old DeKalb cockerels was 3.7 mg/kg.
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机译：从破坏了象鼻虫的栗子中分离出的曲霉（Aspergillus goii Wehmer）培养提取物的腹泻毒素被鉴定为大黄素（2-甲基-4,5,7-三羟基蒽醌）。橙红色结晶毒素（熔点255至257°C）在乙醇中的223、250、267、290和442 nm处显示最大紫外线吸收，在3,400 cm -1 下显示最大红外吸收（OH），1,635和1,625 cm -1 。 A. goii毒素和纯正大黄素的质子磁共振波谱的化学位移和耦合常数一致。口服给予1日龄DeKalb公鸡大黄素的平均致死剂量为3.7 mg / kg。
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