Studies on Triterpenoids. XII

Studies on Japoaescin, a Saponin from Aesculus turbinata BLUME. I. Constitution of Japoaescin

Abstract

Examinations were made on the saponin, japoaescin, contained in the fruit of Aesculus turbinata BLUME, and its components. It was found that japoaescin is formed with a triterpene alcohol of m.p. 293-294°, [α]D=-11.6°, C₃₀H₅₀O₆, as the parent structure, with xylose, glucose, glucuronic acid, and tiglic acid bonded to it in the following manner: C₅₈H₉₀O₂₈+5H₂O=C₃₀H₅₀O₆+C₅H₁₀O₅+C₆H₁₂C₆+2C₆H₁₀O₇+C₅H₈O₂ Japoaescin Japoaescigenol Xylose Glucose Glucuronic Tiglic acid acid.