1. and . Extraction of antitumor diterpenes from Stellera chamaejasme L. Jpn Patent 08310993, 26 April 1996.
2. and . Carcinestatic compounds and production thereof. US Patent 5,616,609, 1 April 1997.
3. Jiangsu New Medical Institute. Dictionary of Chinese Medicines, Vol. 2. Shanghai Scientific and Technical Publishers: Shanghai, China; 1898–1990, 1978.