Some of the triterpenes have already passed the clinical trial for cancer treatment, which induce the progression of tumor cell death by targeting multiple cancer-specific targets by the proteasome, B cell lymphoma 2 (Bcl-2), NF-κB, STAT3, TNF, angiogenesis, PI3K/Akt/mTOR, and (TLR) and improve the cytotoxic action of anticancer chemotherapy by inhibiting the function of the MDR-efflux proteins such as MDR1 (Molnar et al., 2006; Gill et al., 2016). Here, STAT3 is linked to cancer.