STUDIES ON THE MINOR ALKALOIDS OF CEPHALOTAXUS FORTUNEI HOOK. F.

Five minor alkaloids were isolated from Cephalotaxus fortunei Hook. f. Alkaloids Ⅱ and Ⅴ were identified as 3-epimethylschelhammericine B and 3-epischelhammericine. Both were first reported to be present in this plant. Alkaloid Ⅲ was identified as isocephalotaxinone which was isolated from natural source for the first time. Alkaloid Ⅳ is a new alkaloid. Its structure was postulated to be Ⅳ by spectroscopic analysis and designated as 2-epicephalofortuneine.Structure determination of alkaloid I is still underway.