Showing structure for (1r,3r,6r,8s,10r,11s,12r,13s,16s,17r)-8-tert-butyl-6,12,17-trihydroxy-16-methyl-2,4,14,19-tetraoxahexacyclo[8.7.2.0¹,¹¹.0³,⁷.0⁷,¹¹.0¹³,¹⁷]nonadecane-5,15,18-trione