Showing structure for (1r,3s,9s,10s,12s,13s,16s,17r,18s)-10,18-dihydroxy-16-[(1r)-1-hydroxy-1-[(2r,5s)-5-(hydroxymethyl)-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