"At Blue Eye Bio, we provide the molecular precision required for critical drug metabolism research. N-Desmethyl Sildenafil, also known as UK-92480, is the primary active metabolite of Sildenafil formed during first-pass metabolism in the liver.
Parameters | Specification Standard | Method / Note |
Chemical Identity | N-Desmethyl Sildenafil (UK-92480) | -- |
CAS Number | 139755-82-1 | -- |
Molecular Formula | C21H28N6O4S | Theoretical |
Assay (Purity) | ≥ 98.0% / ≥ 99.0% | HPLC Verified |
Appearance | Off-white to Light Yellowish Solid/Powder | Visual |
Characterization | 1H-NMR, LC-MS | Batch-Specific |
Application | Reference Standard / PK-PD Studies | Laboratory Use |
N-Desmethyl Sildenafil (CAS 139755-82-1) is predominantly produced by the CYP3A4 isoenzyme in human hepatocytes. Although it possesses approximately 50% of the pharmacological potency of the parent compound, its quantification is critical in Pharmacokinetic (PK) and Pharmacodynamic (PD) assessments.
Bio-analytical Method Development: Acts as the essential calibrator for blood plasma concentration assays in clinical trials.
Unrivaled Analytical Support: Every gram of our N-Desmethyl Sildenafil is governed by our Unified QC Standard (UQS). We don't just supply a powder; we provide a verified molecular fingerprint.
Q: Why is the purity of N-Desmethyl Sildenafil more critical than the standard API?
Looking for the stable isotope? Explore our [Sildenafil-D3 & D8 Analytical Standards].
Compare with the parent compound: [Sildenafil Base] (CAS 139755-83-2).










