2(5H)-Furanone, 3-[2,13-dihydroxy-13-[octahydro- 5'-(1-hydroxyundecyl)[2,2'-bifuran]-5-yl]tridecyl]- 5-methyl-, [2R-[2.alpha.[2'R*,5'R*(S*)],5.beta.[1(S*),2R*,13R*]]]- Annona bullata (Annonaceae) plant extract Bullatacin NSC615484 Squamocin G