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Obituary
Zenichi Yoshida (1925-2023)
Zenichi Yoshida (1925-2023)
Professor. Zenichi Yoshida,
a member of the Honorary Advisors of HETEROCYCLES (1975-1998),
has passed away on May 4, 2023 at the age of 97.
I deeply express my regret over his death.
Kunio Ogasawara
Editor
May 11, 2023
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Note | Regular issue | Vol 53, No. 10, 2000, pp.2225-2232
Published online, 1st January, 1970■ Prieurianin-Type Tetranortriterpenoids from the Bark of Dysoxylum hainanense
Published online, 1st January, 1970
DOI: 10.3987/COM-00-8973
■ Prieurianin-Type Tetranortriterpenoids from the Bark of Dysoxylum hainanense
Xiao-Dong Luo, Shao-Hua Wu. Xiao-Sheng Yang, Rong-Wei Teng, Yun-Bao Ma, Da-Gang Wu,* Xiao-Jiang Hao, Yang Lu, Xu-Ying Liu, and Qi-Tai Zheng
*Laboratory of Phytochemistry, Kunming Institute of Botany, The Chinese Academy of Sciences, Kunming, Yunnan 650204, China
Abstract
From the ethanolic extract of the bark of Dysoxylum hainanense Merr., three new seco-tetranortriterpenoids structurally related to prieurianin, dysoxylumins A (1), B (2) and C (3) were isolated. Their structures were elucidated on the basis of 1D and 2D NMR techniques. The structure and stereochemistry of compound 1 were demonstrated by X-Ray crystallography.
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