Showing structure for 1,2-diethyl-5,7,8,11,13,16,17,19-octahydroxy-6,18-dimethyl-12-oxapentacyclo[11.8.0.0²,¹¹.0⁴,⁹.0¹⁵,²⁰]henicosa-4,6,8,15,17,19-hexaene-3,10,14,21-tetrone