Figure 1:Bullatacinchemical structure, one out of the three main annonaceousacetogeninmolecules including asimicin and bullatalicin that it is believed to be the one most bio-active anti-cancer molecule found in the Graviola extract

From

Graviola: A Systematic Review on Its Anticancer Properties

Patrikios Ioannis, Stephanou Anastasis, Yiallouris Andreas

American Journal of Cancer Prevention. 2015, 3(6), 128-131 doi:10.12691/ajcp-3-6-5