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A new minor polyoxygenated triterpene named glutinolic acid (1) and two new aeginetic acid quinovosides (2, 3) were isolated from the roots of Rehmannia glutinosa LIBOSCH. (Scrophulariaceae) cultivated in Gunwi-gun, Korea. The structures of these compounds were established as 3α,19α,20β,24,30-pentahydroxyurs-12-en-28-oic acid (1, glutinolic acid), aeginetic acid 5-O-β-D-quinovoside (2) and aeginetoyl ajugol 5″-O-β-D-quinovoside (3) on the basis of chemical and spectroscopic evidence.

A New Polyoxygenated Triterpene and Two New Aeginetic Acid Quinovosides from the Roots of Rehmannia glutinosa