Complete assignment of 1 H and 13 C signals of a triterpene from Agrimonia pilosa Ledeb. by 2D NMR

A known triterpene obtained from Agrimonia pilosa Ledeb. was identified as 1β, 2β, 3β, 19α-tetrahydroxyurs-12-en-28-oic acid. This paper reports the complete assignment of the structure of this compound by the method of 2D NMR for the first time.