CHIEN MING-KUN, YOUNG PAO-TSIN, KU WEN-HUA, CHEN ZHENG-XIONG, CHEN HSING-TE, YEH HSIU-CHIN. STUDIES ON THE ACTIVE PRINCIPLES OF DAN-SHEN——Ⅰ.THE STRUCTURE OF SODIUM TANSHINONE Ⅱ-A SULFONATE AND METHYLENE TANSHINQUINONE[J]. Acta Chimica Sinica, 1978, 36(3): 199-206.