Showing structure for 12-[1-(acetyloxy)-2-methoxy-2-oxoethyl]-6-(furan-3-yl)-15,16-dihydroxy-7,11,13,13-tetramethyl-18-[(2-methylpropanoyl)oxy]-4-oxo-5,17-dioxapentacyclo[13.2.1.0¹,¹⁰.0²,⁷.0¹¹,¹⁶]octadec-2-en-14-yl 2-methylbut-2-enoate