Showing structure for 8,11-dihydroxy-2',4,4',12-tetraoxaspiro[tetracyclo[5.4.1.0¹,⁷.0³,⁵]dodecane-2,3'-tricyclo[7.3.1.0⁵,¹³]tridecane]-1'(13'),5',7',9',11'-pentaen-6-one