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A STUDY OF THE MECHANISM OF FRAGMENTATION OF PYRROLIZIDINE ALKALOIDS IN MASS SPECTROMETRY Ⅰ. RETUSINE, SPECTABILINE, USARAMINE AND DIACETYL-MONOCROTALINE
FANG YI-WEI, BIAN ZE-LIANG, WANG GUANG-HUI, GHAI WEN-GANG
Acta Chimica Sinica . 1981, (
2
): 139 -146 .
