Showing structure for 22-hydroxy-6,6,19,19-tetramethyl-2,5,20-trioxapentacyclo[12.8.0.0³,¹².0⁴,⁹.0¹⁶,²¹]docosa-1(22),3,7,9,11,14,16(21),17-octaen-13-one