Showing structure for 7-{[4,5-dihydroxy-6-(hydroxymethyl)-3-[(2-methylbut-2-enoyl)oxy]oxan-2-yl]oxy}-15-hydroxy-9-methyl-14-methylidenetetracyclo[11.2.1.0¹,¹⁰.0⁴,⁹]hexadecane-5,5-dicarboxylic acid