Showing structure for 2',3-dihydroxy-7-methoxy-6'-methyl-3h-5',12',15'-trioxaspiro[naphtho[2,3-b]furan-2,14'-tetracyclo[8.5.0.0³,⁸.0¹¹,¹³]pentadecane]-1'(10'),2',6',8'-tetraene-4',5,8-trione