New carbazole alkaloids from Murraya euchrestifolia Hayata.
作者:Chichiro ITO、Hiroshi FURUKAWA
DOI:10.1248/cpb.38.1548
日期:——
Five new monomeric carbazoles, named eustifoline-A (1), -B (2), -C (3), and -D (5) and furostifoline (6), and one dimeric carbazole alkaloid, murrastifoline-E (7), were isolated from the root bark of Murraya euchrestifolia collected in Taiwan in December, and their structures were elucidated by spectrometric means. Eustifoline-A (1) and -B (2) have a substituted pyran ring, ad eustifoline-C (3) having a geranyl side chain is considered to be a biogenetic precursor of 2. Eustifoline-D (5) and furostifoline (6) both have a furan ring system and were shown to be structural isomers. The new dimeric carbazole murrastifoline-E (7) was found to have the structure corresponding to deoxygenated murrastifoline-D (8) and to be an adduct of murrayafoline-A (9) with girinimbine (10).
研究人员从 12 月在台湾采集的墨旱莲根皮中分离出五种新的单体咔唑类化合物,分别命名为 eustifoline-A (1)、-B (2)、-C (3)、-D (5)和 furostifoline (6),以及一种二聚咔唑类生物碱,即 murrastifoline-E (7),并通过光谱学方法阐明了它们的结构。Eustifoline-A (1) 和 -B (2) 具有一个取代的吡喃环,而具有香叶基侧链的 Eustifoline-C (3) 被认为是 2 的生物前体。研究发现,新的二聚咔唑 murrastifoline-E (7) 具有与脱氧的 murrastifoline-D (8) 相对应的结构,并且是 murrayafoline-A (9) 与 girinimbine (10) 的加合物。