8-methyl-7-(pent-2-en-3-yl)indolizino[1,2-b]quinolin-9(11H)-one

(+/-)-mappicine

喜树碱

1-溴-2-戊烯

6-methyl-7-(pent-1-en-3-yl)-2,3-dihydroindolizin-5(1H)-one