Chemical Constituents Analysis of Petroleum Ether Extract from Xylaria striata by GC-MS
Luo Jing
School of Life Science and Engineering, Southwest University of Science and Technology, Mianyang 621010, China
Yang Wei
School of Life Science and Engineering, Southwest University of Science and Technology, Mianyang 621010, China
Wu Jiaoqi
School of Life Science and Engineering, Southwest University of Science and Technology, Mianyang 621010, China
Ren Qingyuan
School of Life Science and Engineering, Southwest University of Science and Technology, Mianyang 621010, China
He Xinsheng
School of Life Science and Engineering, Southwest University of Science and Technology, Mianyang 621010, China
Huang Yi *
School of Life Science and Engineering, Southwest University of Science and Technology, Mianyang 621010, China
*Author to whom correspondence should be addressed.
Abstract
Aims: To analyze the chemical constituents of petroleum ether extract of Xylaria striata.
Methodology: Xylaria striata was extracted by petroleum ether, and then the extract was analyzed by Gas Chromatography-Mass Spectrometer (GC-MS). Identification of compounds was achieved from their GC retention indices (RI) relative to n-alkanes and by computer search using libraries of NIST05, as well as comparisons of the fragmentation pattern of the mass spectra with data published in the literature.
Results: Thirty-seven compounds were separated by gas chromatography. Based on the NIST spectral library and corresponding literature information, thirty compounds which covered 98.43% of the total peaks were identified. Most of them were fatty acids and their esters (77.58%), steroids (19.44%). The methyl linoleate covered 38.23% of the total peaks, while methyl palmitate was 19.12%, methyl linoleate (9-cis, 12-trans) was 5.15%, methyl oleate was 4.43% and methyl stearate was 3.3%.
Conclusion: This is the first report of chemical constituents of the petroleum ether extract of Xylaria striataby GC-MS. The result will provide ample information for further exploration and utilization of Xylaria striata.
Keywords: Xylaria striata, petroleum ether extract, GC-MS, chemical constituents