Two aminooligosaccharides. isovalertatins D03 (1) and D23 (2). were isolated from the culture filtrate of Streptomyces luteogriseus. Their structures were reinvestigated and revised by spectroscopic evidences includin...Two aminooligosaccharides. isovalertatins D03 (1) and D23 (2). were isolated from the culture filtrate of Streptomyces luteogriseus. Their structures were reinvestigated and revised by spectroscopic evidences including ESI multistage mass spectrometry and 2-dimensional NMR techniques.展开更多
From the marine sponge Jaspis sp., a new isomalabaricane triterpenoid 22, 23- dihydrostellettin D (1) was isolated, and its structure was established on the basis of IR, MS and extensive 2D NMR spectroscopic analysis....From the marine sponge Jaspis sp., a new isomalabaricane triterpenoid 22, 23- dihydrostellettin D (1) was isolated, and its structure was established on the basis of IR, MS and extensive 2D NMR spectroscopic analysis. It is a unique skeleton compound rarely obtained from Chinese marine organisms.展开更多
基金This project was financially supported by the National Natural Sciences Foundation of China (Grants 39930180 and 39625025).
文摘Two aminooligosaccharides. isovalertatins D03 (1) and D23 (2). were isolated from the culture filtrate of Streptomyces luteogriseus. Their structures were reinvestigated and revised by spectroscopic evidences including ESI multistage mass spectrometry and 2-dimensional NMR techniques.
基金The work was supported by grants from National High Technology Development Project(863 project)(No.2001AA620403 and 2002AA217081)NNSFC(30171106,40176038)
文摘From the marine sponge Jaspis sp., a new isomalabaricane triterpenoid 22, 23- dihydrostellettin D (1) was isolated, and its structure was established on the basis of IR, MS and extensive 2D NMR spectroscopic analysis. It is a unique skeleton compound rarely obtained from Chinese marine organisms.
