They are on a different family. Pawpaw is a northern cousin of the Cherimoya (that also has acetogenins, but is in every supermarket). The tropical Soursop has

They are on a different family. Pawpaw is a northern cousin of the Cherimoya (that also has acetogenins, but is in every supermarket). The tropical Soursop has even more and nobody cares (tip: They should. Anybody visiting Latinoamerica should be aware of it. The family has a lot of delicious fruits). The real problem is the dull aspect (like a greyish-green potato) and short shelf life of paw paw.