New dibenzofuran and anthraquinone from Usnea longissima
Feng, J.; Yang, X.
Zhongguo Zhong Yao Za Zhi 34(7): 852-853
2009
ISSN/ISBN: 1001-5302 PMID: 19623979 Document Number: 632385
To study the chemical constituents of Usnea longissima. The compounds were isolated and purified by the methods of solvent extraction and chromatographic technique, and their structures were identified on the basis of the analyses of spectral data. Two compounds were obtained and identified as 3, 6-diacetyl-2, 7, 9-trihydroxy-8, 9b-dimethyl-1 [9bH]-dibenzofuranone(1) and 1, 3, 8-trihydroxy4, 6-dimethyl-9, l0-anthracenedione(2), respectively. Compounds 1 and 2 were new compounds and were named as longiusnine and longissimausnone, respectively.