Steroid glycosides of the roots ofCapsicum annuum. I. The structure of capsicosides A1, B1, and C1

Three new steroid glycosides of the spirostan series — capsicosides A₁, B₁, and C₁ — have been isolated from a methanolic extract of the roots of red pepper. In an investigation of the products of complete acid hydrolysis of these glycosides, a single aglycon — gitogenin — was identified. The complete chemical structure of each of the capsicosides has been shown with the aid of complete and partial acid hydrolysis, methylation and methanolysis, and periodate oxidation, and also by physicochemical methods of investigation.Institute of Chemistry, Academy of Sciences of the Moldavian SSR, Kishinev. Institute of Ecological Genetics, Academy of Sciences of the Moldavian SSR, Kishinev. Translated from Khimiya Prirodnykh Soedinenii, No. 6, pp. 708–712, November–December, 1986.