The structural assignment of each of five sugar components from a basic antibiotic, sporaviridin, is described : two are neutral monosacharides, D-quinovose and D-glucose, and the remaining three are amino sugars, D-viosamine, D-acosamine and L-vancosamine. D-Acosamine is only the second example of a 3-amino-2, 3, 6-trideoxyhexose having D-configuration to be isolated from nature (D-angolosamine was the first).
