Showing structure for (17r)-12,21,23-trihydroxy-8,8,18,18-tetramethyl-3,9,19-trioxahexacyclo[15.6.1.0²,¹⁵.0⁴,¹³.0⁵,¹⁰.0²⁰,²⁴]tetracosa-1(23),2(15),4,6,10,12,20(24),21-octaen-14-one