Seven new dammarane triterpenes from the floral spikes of Betula platyphylla var. japonica.
Seven new dammarane-type triterpenoids, including two 20(S)-hydroxy-25-methoxy-dammar-23-enes (1 and 2), two 20(S),24(R)-epoxydammaranes (3 and 4), a cabralealactone (5), and two 20(S),25-epoxydammaranes (6 and 7), together with seven known triterpenes (8-14), were isolated from the floral spikes of Betula platyphylla var. japonica. The structures for all compounds were elucidated by the analyses of extensive spectroscopic data, as well as chemical examinations.
Xiong
Juan
J
Graduate School of Pharmaceutical Sciences, University of Tokushima, 1-78 Shomachi, Tokushima 770-8505, Japan.
Taniguchi
Masatoshi
M
Kashiwada
Yoshiki
Y
Yamagishi
Takashi
T
Takaishi
Yoshihisa
Y
D029662:Betula / Q000737:chemistry*; D035263:Flowering Tops / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy; D015394:Molecular Structure; D014315:Triterpenes / Q000737:chemistry*
D014315:Triterpenes
Bioorg Med Chem. 2010 Apr 15;18(8):2964-75
20363142
Phytochemistry. 1998 Nov 20;49(6):1745-1748
11711093
J Nat Prod. 2005 Dec;68(12):1787-9
16378377
Phytochemistry. 2010 Jun;71(8-9):956-63
20231024
Phytochemistry. 1997 Mar;44(6):1115-9
9101665
Org Biomol Chem. 2007 Mar 7;5(5):792-801
17315066
J Nat Prod. 2007 Apr;70(4):623-7
17346076
J Nat Prod. 2005 Feb;68(2):198-206
15730243
Phytochemistry. 2001 Apr;56(8):815-8
11324910
Chem Pharm Bull (Tokyo). 1994 Mar;42(3):634-40
8004713
J Am Chem Soc. 2005 Dec 28;127(51):18008-9
16366544