Showing structure for (2e)-4-[(1r,2r,13r,15s)-6,8-dihydroxy-5-[(2r)-2-hydroxy-3-methylbut-3-en-1-yl]-17,17-dimethyl-7-(3-methylbut-2-en-1-yl)-10,14-dioxo-3,16-dioxapentacyclo[11.4.1.0²,¹¹.0²,¹⁵.0⁴,⁹]octadeca-4(9),5,7,11-tetraen-15-yl]-2-methylbut-2-enal