Showing structure for 3,4,5-trihydroxy-6-{[13-(2-methoxy-2-oxoethyl)-11-methyl-2,9-dioxo-12,15-dioxatetracyclo[8.4.1.0¹,¹⁰.0³,⁸]pentadeca-3,5,7-trien-7-yl]oxy}oxane-2-carboxylic acid