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