Nandrolone Phenylpropionate is also known as Durabol is one of the brand names among numerous names of Deca Durabolin, which is actually the most popular brand name for the component Nandrolone Decanoate. Nandrolone is itself a DHT derived steroid, which has been attached to decanoate ester. The attachment increases the time for Nandrolone Decanoate to stay in the body. For the record, the prime component for Durabol 100, Nandrolone Decanoate was introduced in the medical field in 1962.