Showing structure for (1r,2r,3s,11r,12r,14r,16s,17r,18r,19s)-3,19-bis(acetyloxy)-16-(furan-3-yl)-2,7,7,11,17-pentamethyl-5,10-dioxo-6,13-dioxapentacyclo[9.8.0.0²,⁸.0¹²,¹⁴.0¹²,¹⁷]nonadecan-18-yl 2-methylbutanoate