Separated from the three sharp cedar genus one anti-tumor alkaloids, is a cell cycle-specific drugs, G1 and G2 phase of the cell killing effect of the strongest, while a smaller effect on cells in S phase. HHPT major inhibition of protein synthesis in eukaryotic cells, combined inhibition of the formation of aminoacyl -tRNA ribosomes and ribosomal peptide chain, thus the impact of an early stage before the polymer is formed, and polysome depolymerization off, interfere with protein function of ribosomes, the cell DNA synthesis is also inhibited. This product is to promote the process of degeneration and necrosis of the nucleus and tri HARRINGTONINE same. HHRT can promote cell differentiation and apoptosis.