Legit Nandrolone Phenylpropionate Powder | Durabolin Raw Steroid Powder For Sale What is Nandrolone phenylpropionate ? Nandrolone phenylpropionate (brand name Durabolin, Fenobolin, others), as well as 19-nortestosterone 17β-phenylpropionate or 17β-(1-oxo-3-phenylpropoxy)estr-4-en-3-one, is a synthetic androgen and anabolic steroid and a nandrolone ester. Along with nandrolone decanoate, is one of the most widely used nandrolone esters. Both NPP and nandrolone decanoate are prodrugs of …