STUDIES ON THE ACTIVE PRINCIPLES OF DAN-SHEN——Ⅰ.THE STRUCTURE OF SODIUM TANSHINONE Ⅱ-A SULFONATE AND METHYLENE TANSHINQUINONE
CHIEN MING-KUN, YOUNG PAO-TSIN, KU WEN-HUA, CHEN ZHENG-XIONG, CHEN HSING-TE, YEH HSIU-CHIN
Acta Chimica Sinica . 1978, (3): 199 -206 .