Showing structure for methyl 2-[13-(6-hydroxy-6-methyl-4-oxohept-2-en-2-yl)-5,9,10-trimethyl-3-oxo-2-oxatetracyclo[7.6.1.0⁵,¹⁶.0¹⁰,¹⁴]hexadecan-6-yl]-2-methylpropanoate