| Literature DB >> 18239309 |
Seong Su Hong1, Seon A Lee, Xiang Hua Han, Min Hee Lee, Ji Sang Hwang, Jeong Sook Park, Ki-Wan Oh, Kun Han, Myung Koo Lee, Heesoon Lee, Wook Kim, Dongho Lee, Bang Yeon Hwang.
Abstract
Two new melampolide-type sesquiterpene lactones, 8beta-epoxyangeloyloxy-9alpha-ethoxy-14-oxo-acanthospermolide (1) and 8beta-angeloyloxy-9alpha-ethoxy-14-oxo-acanthospermolide (2), were isolated from the leaves of yacon [Smallanthus sonchifolia (POEPP. et ENDL.) H. Robinson] along with eleven known melampolides, allo-schkuhriolide (3), enhydrin (4), polymatin A (5), fluctuanin (6), 8beta-angeloyloxy-9alpha-acetoxy-14-oxo-acanthospermolide (7), 8beta-angeloyloxy-14-oxo-acanthospermolide (8), 8beta-methacryloyloxymelampolid-14-oic acid methyl ester (9), uvedalin (10), polymatin B (11), 8beta-tigloyloxymelampolid-14-oic acid methyl ester (12), and sonchifolin (13). Their structures were established on the basis of spectroscopic evidence including 1D- and 2D-NMR experiments. All isolates were evaluated for inhibition of LPS-induced nitric oxide production in murine macrophage RAW 264.7 cells.Entities:
Mesh：
Substances：
Year: 2008 PMID： 18239309 DOI： 10.1248/cpb.56.199
Source DB: PubMed Journal: Chem Pharm Bull (Tokyo) ISSN： 0009-2363 Impact factor: 1.645