Chemical Identity

Nandrolone Phenylpropionate is a synthetic derivative of Nandrolone, modified with a Phenylpropionate ester at the 17-beta hydroxyl position. It belongs to the 19-nor class, characterized by the absence of the carbon at position 19.

Molecular Details

Molecular Formula: C₂₇H₃₄O₃

Molecular Weight: Approximately 406.6 g/mol

Structure Type: 19-nor anabolic steroid

Structural Description

The molecule maintains the classic four-ring steroid backbone with a ketone group at the C3 position and a double bond between C4 and C5. The absence of the C19 methyl group differentiates it from testosterone. The defining structural feature is the esterification at the 17-beta hydroxyl group with a phenylpropionate ester, which includes a benzene ring attached to a short propionate chain. This creates moderate lipophilicity compared to both shorter and longer esters.

Functional Significance

The phenylpropionate ester does not alter the anabolic or androgenic properties of nandrolone but regulates its release rate and half-life. Due to its intermediate ester length, Nandrolone Phenylpropionate exhibits a moderate release profile with a half-life of approximately 3 to 4 days. This allows for relatively stable hormone levels with more frequent administration compared to long esters, but less frequent than short esters.

Summary

Nandrolone Phenylpropionate is a medium-acting 19-nor derivative that balances release speed and duration. Its structural design provides controlled release while maintaining the biological activity of nandrolone, making it distinct from both shorter and longer ester variants.