Chemical Identity

Nandrolone Decanoate is a synthetic derivative of Nandrolone, modified with a Decanoate ester attached at the 17-beta hydroxyl position. It belongs to the 19-nor class, meaning the carbon at position 19 is absent compared to testosterone.

Molecular Details

Molecular Formula: C₂₈H₄₄O₃

Molecular Weight: Approximately 428.7 g/mol

Structure Type: 19-nor anabolic steroid

Structural Description

The molecule retains the four-ring steroid backbone and includes a ketone group at the C3 position along with a double bond between C4 and C5. The absence of the C19 methyl group distinguishes it structurally from testosterone. The defining feature is the esterification at the 17-beta hydroxyl group, where a long-chain decanoate ester is attached. This significantly increases lipophilicity, allowing prolonged storage in oil-based depots and gradual release into circulation.

Functional Significance

The decanoate ester does not affect the intrinsic anabolic or androgenic activity of nandrolone. Its primary role is to slow the release rate and extend the compound’s half-life. Due to its long ester chain, Nandrolone Decanoate exhibits a prolonged half-life typically ranging from 6 to 12 days, supporting infrequent administration and stable plasma levels over time.

Summary

Nandrolone Decanoate is a long-acting 19-nor derivative characterized by its extended ester chain and modified steroid structure. Its design enables sustained release and prolonged activity, making it a commonly referenced compound in both research and clinical contexts.