Heterocycles p. 2253 - 2260 (1997)
Update date:2022-09-26
Topics:
Ogino, Tatsunori
Yamaguchi, Takuji
Sato, Toshitsugu
Sasaki, Hiroshi
Sugama, Ko
Okada, Minoru
Maruno, Masao
A new phenolic bisbenzylisoquinoline (BBI) alkaloid named 2′-N-norfangchinoline was isolated from the root of Stephania tetrandra S. MOORE along withfangchinoline (2) and atherospermoline (3). The chemical structure of 2′-N-norfangchinoline was proved to be 4 by spectral analyses and chemical methods. Moreover three phenolic BBI alkaloidal compounds, 2,2′-N,N-dinorfangchinoline (8), 2′-N-noratherospermoline (9), 2-N-norfangchinoline (10) were derived from tetrandrine (1). And 12-O-acetyl atherospermoline (11) was obtained by partial acetylation of atherospermoline (3). Seven phenolic BBI compounds (2, 3, 4, 8, 9, 10, and 11) also have the inhibitory effect on acetylcholinesterase.
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