作者
Kartini Ahmad, Yusuke Hirasawa, Alfarius Eko Nugroho, A Hamid A Hadi, Koichi Takeya, Noel F Thomas, Khalijah Awang, Hiroshi Morita, Tan Siow Ping, Mohd Azlan Nafiah
发表日期
2013/12/30
期刊
The Open Conference Proceedings Journal
卷号
4
期号
1
简介
Study on chemical constituents from Kopsia singapurensis (Apocynaceae) yielded four new aspidofractinines: Singaporentine A (1), N (1)-formylkopsininic acid (2), N (1)-formylkopsininic acid-N (4)-oxide (3), 15-hydroxykopsamine (4); a new aspidospermatan: 14α-hydroxy-N (4)-methylcondylocarpine (5) and a new akuamiline: singaporentinidine (6) together with 18 known indole alkaloids from different parts of the plant. The structures of these compounds were elucidated by combination of various spectroscopic methods.
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K Ahmad, Y Hirasawa, AE Nugroho, AHA Hadi… - The Open Conference Proceedings Journal, 2013