Leonurosides A–D: Steroid N-acetylglucosaminides from the fruits of Leonurus japonicus
摘要:
Four new naturally occurring steroidal glycosides (leonurosides A-D, 1-4) were isolated from the dried fruits of Leonurus japonicus (motherwort fruit). Their structures were established by spectroscopic and chemical methods. The monosaccharide unit was identified to be a 2-acetamido-2-deoxy-beta-D-glucose and the aglycone is either a common 3 beta-stigmasterol or 3 beta-ergosterol derivative. These compounds are the first representatives of steroid N-acetylglucosaminides from vascular plants. (C) 2014 Phytochemical Society of Europe. Published by Elsevier B.V. All rights reserved.