Showing structure for (1s,2r,4r,9s,10s,13r,16r,18r,19r)-18-hydroxy-5,5,9-trimethyl-14-oxo-15,17-dioxapentacyclo[11.5.1.0¹,¹⁰.0⁴,⁹.0¹⁶,¹⁹]nonadecan-2-yl acetate