83159-27-7 AIDS-130633 AIDS130633 Epoxyshikoccin NSC607642 {5H-2,11a-Ethanobenzo[5,6]cyclodec[1,} 2-b\]oxirene-5,12-dione, 8-(acetyloxy)dodecahydro-11-hydroxy-5a,9, 9-trimethyl-13-methylene-, {[1aR-(1aR*,2S*,5aR*,8S*,9aR*,11R*,} 11aR*)\]-