7599-61-3 7H-8,15b-Methano-1H,3H,12H-benzo(de)cyclohepta(1,2-g:3,4,5-d'e')bis(2)benzopyran-3,7,12,14(8H)-tetrone, 16-(acetyloxy)-4,11,15-trihydroxy-6,9-dimethyl-, (8R-(8alpha,15balpha,16S*))- Xenoclauxin