Isolation, characterization, and NMR spectroscopic data of indole and oxindole alkaloids from Mitragyna speciosa
Articles > Article · 2013
Authors: Zulfiqar Ali, Hatice DEMİRAY, Ikhlas A. Khan
Tetrahedron Letters, Journal Indexed in SCI Expanded, International, WoS, 2013, vol 55, pp 369-372
DOI: 10.1016/j.tetlet.2013.11.031
Summary
A new indole alkaloid, 7 beta-hydroxy-7H-mitraciliatine (1) and a new oxindole alkaloid, isospeciofoleine (2) together with nine known alkaloids were isolated from Mitragyna speciosa and characterized by NMR, CD, and MS spectroscopic data analyses. The H-1 and C-13 NMR spectroscopic data of isospeciofoline (3), isorotundifoline (4), paynantheine (5), and 3-isopaynantheine (6) were also reported for the first time. (C) 2013 Elsevier Ltd. All rights reserved.