Wang P-L, Cheng Y-T, Xu K, An Y-W, Wang W, Li Q-S, et al. Synthesis and Antitumor Evaluation of One Novel Tetramethylpyrazine-Rhein Derivative. ajc [Internet]. 2013 Apr. 9 [cited 2024 Jul. 23];25(9):4885-8. Available from: https://asianpubs.org/index.php/ajchem/article/view/25_9_41