12687-71-7 33286-30-5 35988-42-2 Carboxyatractylate Kaur-16-ene-18,19-dioic acid, 15-hydroxy-2-((2-O-(3-methyl-1-oxobutyl)-3,4-di-O-sulfo-alpha-D-glucopyranosyl)oxy)-, (2beta,15alpha)-