Asparagusic acid (4-carboxy-1,2-dithiolane), found in asparagus roots, is considered to be a major factor in the natural resistance (i.e., survival in the soil) of this plant; 4-methylthio-1,2-dithiolane is a photosynthesis inhibitor from the stonewort. The characteristic flavor of the shiitake mushroom is due to the…
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