Showing structure for 7-(furan-3-yl)-10-hydroxy-1,8,12,17,17-pentamethyl-5,15-dioxo-3,6,16-trioxapentacyclo[9.9.0.0²,⁴.0²,⁸.0¹²,¹⁸]icos-13-en-20-yl acetate