Showing structure for (3as,4s,5r,9ar,9br)-8-chloro-5-hydroxy-9-(hydroxymethyl)-6-methyl-3-methylidene-2,7-dioxo-3ah,4h,5h,9ah,9bh-azuleno[4,5-b]furan-4-yl (2e)-2-methylbut-2-enoate