Cinobufaginol
Cinobufaginol is a natural bufadienolide isolated from toad venom which has been widely used for centuries in China to treat different disorders, especially for cancer. Cinobufaginol potently inhibits the activity against human nasopharyngeal carcinoma cell lines with IC50s of 803 μΜ and 1.270 μΜ for CNE-1 and CNE-2Z, respectively[1].