Showing structure for 7-[(5-hydroxy-4-methoxy-6-methyloxan-2-yl)oxy]-10,15,19-trimethyl-14-oxapentacyclo[11.5.1.0²,¹¹.0⁵,¹⁰.0¹⁶,¹⁹]nonadec-4-ene-12,18-dione