What exactly is paclitaxel (onxol, taxol)?

Drug from a tree: Taxol is a chemotherapy drug used commonly to treat breast cancer. It's generic name is paclitaxel. It is also used to treat ovarian, lung, prostate, bladder, melanoma, esophageal cancer and other solid tumor cancers. It is made fromthe pacific yew tree bark. It works by preventing the cancer cells from dividing and therefore stops their growth.

Chemical from tree: Taxol (paclitaxel) is a natural chemical from a tree. It is a natural compound.