9William W, Gerald I, Jerry McKay. Alkaloids from Cephalotaxus drupacea and Cephalotaxus fortunei[J]. J Org Che,1963,28(9):2194-2197.
10Takano I, Yasuda I, Nishijima M. Cephalotaxidine, a novel dimeric alkaloid from Cephalotaxus harringtonia var. drupacea[J]. Tetrahedron Letters,1996,37(39):7053-7054.