Showing structure for 16-[1-(3-hydroxy-5-methyl-6-oxo-2,3-dihydropyran-2-yl)ethyl]-8,8,13,17-tetramethyl-7-oxatetracyclo[10.7.0.0³,⁹.0¹³,¹⁷]nonadeca-1(12),2,4-trien-6-one