xenoclauxin

(8R,16S)-16-Acetoxy-4,11,15-trihydroxy-6,9-dimethyl-7H-8,15bβ-methano-1H,3H,12H-benzo[de]cyclohepta[1,2-g:3,4,5-d'e']bis[2]benzopyran-3,7,12,14(8H)-tetrone