Showing structure for methyl 3,16-dihydroxy-13-(2-hydroxy-6-methyl-4-oxohept-5-en-2-yl)-2,5,5,9,10-pentamethyl-4-oxotetracyclo[7.7.0.0²,⁶.0¹⁰,¹⁴]hexadecane-3-carboxylate