3,4-Epoxy-14-oxo-7,18-dolabelladiene 8-Isopropenyl-1a,5,10a-trimethyl-2,3,6,7,7a,8,9,10a,11,11a-decahydrocyclopenta[4,5]cycloundeca[1,2-b]oxiren-10(1aH)-one AIDS-145130 AIDS145130 NSC669388