... % natural plant extract Rhein 98% HPLCCAS No.: 478-43-3Synonyms 4,5-Dihydroxyanthraquinone-2-carboxylic acid; 1,8-Dihydroxy-3-carboxyanthraquinone; 9 ... ,10-Dihydro-4,5-dihydroxy-9,10-dioxo-2-anthracenecarboxylic acid; Rhubarb yellow; Cassic acidMolecular formula: C15H8O6 Molecular weight: 284.21Melting ... ureteral peristalsis, increased urine output. Factory supply aloe extract: Rhein acid 98% HPLC