Showing structure for (1s,2r,4s,7s,8s,11r,12r,13s,18r,20r)-13-(acetyloxy)-7-(furan-3-yl)-1,8,12,17,17-pentamethyl-5,15-dioxo-3,6,16-trioxapentacyclo[9.9.0.0²,⁴.0²,⁸.0¹²,¹⁸]icosan-20-yl acetate