Cephalotaxine is a benzazepine alkaloid isolated from Cephalotaxus harringtonia with function of antiviral and antitumor.

Cephalomannine, a natural product isolated and purified from the barks of Cephalotaxus sinensis (Rehd. et Wils.) Li, is a taxol derivative with antitumor, antiproliferative properties.

Homoharringtonine is a cytotoxic alkaloid from the evergreen tree.

Tsugafolin is a natural product isolated and purified from the barks of Cephalotaxus sinensis with weak anti-HIV activity.

Epinortrachelogenin is a natural product isolated and purified from the barks of Cephalotaxus sinensis.

Taiwanhomoflavone B, a natural product isolated and purified from the barks of Cephalotaxus fortunei, is cytotoxic with ED(50) values of 3.8 and 3.5 mg/mL, against KB oral epidermoid carcinoma and Hepa-3B hepatoma cells, respectively.

3'-Methyl-4-O-methylhelichrysetin is a natural product isolated and purified from the barks of Cephalotaxus sinensis.

Fortuneine is a natural product isolated and purified from the herbs of Senecio triangularis.

4-O-Methylhelichrysetin is a natural product isolated and purified from the herbs of Cephalotaxus sinensis.

Taiwanhomoflavone A, a natural product isolated and purified from the stems of Cephalotaxus wilsoniana, is cytotoxic with ED50 values of 3.4, 1.0, 2.0 and 2.5 mg/mL, respectively, against KB epidermoid carcinoma of nasopharynx, COLO-205 colon carcinoma, Hepa-3B hepatoma, and Hela cervix tumor cells.