LiY., YouG., DuanR., LiuK., and WangD. “Simultaneous Determination of Danshensu, Protocatechuic Acid, Protocatechuic Aldehyde, Rosmarinic Acid and Salvianolic Acid B in Three Processing Products of White Flower &Nbsp;Salvia Miltiorrhiza by HPLC”. Asian Journal of Chemistry, Vol. 25, no. 17, Nov. 2013, pp. 9558-60, https://asianpubs.org/index.php/ajchem/article/view/8549.