作者:Vikas Kumar、Mehak Gupta、Sumit G. Gandhi、Sonali S. Bharate、Ajay Kumar、Ram A. Vishwakarma、Sandip B. Bharate
DOI:10.1016/j.tetlet.2017.09.005
日期:2017.10
Herein we report isolation of a new chromone alkaloid chrotacumine K (12) from fruits and a chromone glycoside schumaniofioside A (13) from leaves of Dysoxylum binectariferum Hook f. Schumaniofioside A is reported for the first time from Meliaceae family. Other known alkaloids isolated include rohitukine (1) and chrotacumine E (6). The structure of new alkaloid 12 was elucidated on the basis of extensive
在这里,我们报告从水果中分离出一种新的色酮生物碱chrotacumine K(12)和从Dysoxylum binectariferum Hook f的叶中分离出一种色酮糖苷舒曼茶苷A(13)。菊苣科植物中首次报道了舒马尼磷苷A。分离出的其他已知生物碱包括罗基图宁(1)和色胺素E(6)。在广泛的1D和2D NMR分析,合成和化学水解的基础上,阐明了新生物碱12的结构。化学上,chrotacumine K(12)是一种3'- O-乙酰基罗基图因,在化学或酶促水解作用下会生成罗基图因。新生物碱12也存在于该植物的种子和茎皮中。糖苷类人卵磷脂A(13)仅存在于叶片中,并且含量丰富(干燥叶片的〜1%w / w)。评价分离的化合物和提取物对人单核细胞THP-1细胞中促炎细胞因子(TNF-α和IL-6)的体外作用。生物碱12在0.3 µM时显示出对TNF-α的有效抑制(57%),并且对高达40 µM的