Showing structure for 10,18-dihydroxy-16-[1-hydroxy-1-(5-methyl-6-oxooxan-2-yl)ethyl]-8,8,13,17-tetramethyl-7-oxapentacyclo[10.7.0.0¹,³.0³,⁹.0¹³,¹⁷]nonadec-4-en-6-one