1. In press;Hansan;Science
2. In preparation In press;Kupchan;Org Chem Science Science Science,1969
3. cannot adequately express my indebtedness to these colleagues Our work has been generously supported by the National Cancer Institute and the American References Cam;Kupchan;Cancer Society Science Med Chem,1965
4. In press;Kupchan;Org Chem