The evaluation of potent antitumor activities of shikonin coumarin-carboxylic acid, PMMB232 through HIF-1α-mediated apoptosis - Han, H W; Zheng, C S; Chu, S J; Sun, W X; Han, L J; Yang, R W; Qi, J L; Lu, G H; Wang, X M; Yang, Y H (Biomed Pharmacother, 2018)