9Yoshikawa M, Tomohiro N, Murakami T, et al. Studies on alismatis rhizoma. Ⅲ. stereostructure of new protostane-type trierpene alisol H, I,J-23-acetate, K-23-acetate, L-23-acetate, M-23-acetate, N-23-acetate,from the dried thizoma of alisma orientale[J]. Chem Pharm Bull, 1999,47(4) :524 - 528.
