3. Taxol
Taxus species belong to the family Taxaceae (Yew) and produce the natural anticancer diterpenoid taxol (Paclitaxel) (Fig. 4A ). Taxol is highly effective in the treatment of various types of cancers and diseases that require microtubule stabilization, including cardiac functional recovery and psoriasis (Ehrlich et al., 2004; Xiao et al., 2012). Taxol was firstly isolated from the bark of the Pacific yew tree (Taxus brevifolia ). Still, later, it has been produced from various other natural plant sources, although the yield is meager when extracted traditionally (Yamgar and Sawant, 2015) (Fig. 4B ).