Isolation and Purification of Usnic Acid from Usnea longissima by Preparative High-speed Counter-current Chromatography
CHI Chun-yan1，SHI Bo1,*，CHENG Yong-qiang2，LIANG Ping1，LI Jing-mei3
FOOD SCIENCE . 2009, (3): 127 -129 .  DOI: 10.7506/spkx1002-6630-200903027