A fragmentation study of podophyllotoxin and its 4′-demethyl-4β-substituted derivatives by electrospray ionization ion-trap time-of-flight tandem mass spectrometry

2007 ◽  
Vol 21 (17) ◽  
pp. 2843-2852 ◽  
Author(s):  
Qianrong Li ◽  
Guoquan Yan ◽  
Tiefei Ge
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