Podophyllotoxin,picropodophyllotoxin and their eight esters were studied using EI MS.The 2-epimers of podophyllotoxin and its esters can be identified by calculating the rate of relative abundance of m/z 168,396 to mo...Podophyllotoxin,picropodophyllotoxin and their eight esters were studied using EI MS.The 2-epimers of podophyllotoxin and its esters can be identified by calculating the rate of relative abundance of m/z 168,396 to molecular ion peak in EI MS.展开更多
文摘Podophyllotoxin,picropodophyllotoxin and their eight esters were studied using EI MS.The 2-epimers of podophyllotoxin and its esters can be identified by calculating the rate of relative abundance of m/z 168,396 to molecular ion peak in EI MS.
