STUDIES ON THE FRAGMENTATION OF DITERPENE QUINONES RELATED TO TANSHINONE UNDER ELECTRON IMPACT——THE OBSERVATION OF AN UNUSUAL (M-O) FRAGMENT ION
LIU BAI-NIAN, DAI MAN-LI, YANG BAO-JIN, CHEN ZHENG-XIONG, HUANG ZHI-HENG
Acta Chimica Sinica . 1982, (11): 1029 -1037 .