1. Bhanot A, Sharma R, Noolvi MN. Natural sources as potential anti-cancer agents: a review. Int J Phytomedicine. 2011;3:09–26.
2. Kinghorn AD, Chin Y-W, Swanson SM. Discovery of natural product anticancer agents from biodiverse organisms. Curr Opin Drug Discov Devel. 2009;12:189–96.
3. Kawaii S, Tomono Y, Ogawa K, Sugiura M, Yano M, Yoshizawa Y. The antiproliferative effect of coumarins on several cancer cell lines. Anticancer Res. 2001;21:917–23.
4. Chang WS, Lin CC, Chuang SC, Chiang HC. Superoxide anion scavenging effect of coumarins. Am J Chin Med. 1996;24:11–7.
5. Yue J-M, Xu J, Zhao Y, Sun H-D, Lin Z-W. Chemical components from ceratostigma willmottianum. J Nat Prod. 1997;60:1031–3.