STUDIES ON THE ALKALOIDS OF STEPHANIA LONGA L.
LAO AI-NA, GAO YAO-LIANG, TANG ZONG-JIAN, WANG YU-HUA, ZHANG XIAN-XING, WANG CHANG-GEN, XU REN-SHENG
Acta Chimica Sinica . 1982, (11): 1038 -1043 .