Showing structure for (1r,2s,4s,8r,11s,13r,14r)-2-hydroxy-11-methyl-4-(prop-1-en-2-yl)-15,17,18-trioxatetracyclo[11.2.2.1⁸,¹¹.0¹,¹⁴]octadecane-6,9,16-trione