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S4 (Andarine), (25mg/capsule) 60 Capsules

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S4 (Andarine, GTx-007) is a propanamide-class non-steroidal selective androgen receptor modulator (SARM) originally developed as a high-affinity androgen receptor (AR) ligand. It functions as a partial agonist at AR and has been characterized by its differential transcriptional activation profile across distinct androgen receptor signaling systems. Experimental investigations have demonstrated selective modulation of AR-mediated gene expression and receptor-cofactor interactions, distinguishing S4 from full androgen receptor agonists. Research applications include androgen receptor pharmacology, AR partial agonism studies, receptor-mediated transcriptional regulation, ligand-receptor interaction analysis, and structure-activity relationship investigations involving non-steroidal SARM scaffolds.

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3D Molecular Structure

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Select12.5mg/100tabs | 25mg/60 capsules
Chemical Formula C19H18F3N3O6
Synonyms Andarine, 401900-40-1, GTX-007, (2S)-3-(4-acetamidophenoxy)-2-hydroxy-2-methyl-N-[4-nitro-3-(trifluoromethyl)phenyl]propanamide, GTX00
Molar Mass 441.4 g/mol
CAS Number 401900-40-1
PubChem CID 9824562
Total Compound Content 1,500 mg (25 mg per capsule)
Shelf Life 36 months
S4 (Andarine) is a propanamide-class non-steroidal selective androgen receptor modulator (SARM) developed as a high-affinity androgen receptor (AR) ligand. AR binding affinity is in the low nanomolar range, and the compound functions as a partial agonist of the androgen receptor, producing a distinct receptor-mediated transcriptional profile through differential co-activator recruitment and selective modulation of AR-dependent gene expression pathways. These characteristics distinguish S4 from full androgen receptor agonists and have established it as a valuable research tool for investigating androgen receptor pharmacology, receptor-cofactor interactions, and transcriptional regulation mechanisms. Experimental investigations have examined the relationship between S4 and AR-mediated signaling networks, ligand-receptor binding dynamics, and pathway-specific regulatory systems associated with androgen receptor activation. Research applications include AR partial agonism studies, receptor pharmacology, structure-activity relationship investigations, transcriptional control mechanisms, and mechanistic evaluation of non-steroidal androgen receptor modulators. Supplied in 25 mg capsules. Independently third-party HPLC-tested; COA available per batch.

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What distinguishes S4 (Andarine) from other androgen receptor modulators?

S4 is a propanamide-class non-steroidal androgen receptor modulator characterized by partial agonist activity at the androgen receptor (AR). Unlike full AR agonists, S4 produces a distinct receptor-mediated transcriptional profile through differential co-activator recruitment and selective modulation of AR-dependent gene expression pathways. These characteristics make it a valuable research tool for investigating partial agonism, receptor pharmacology, and androgen receptor-mediated signaling mechanisms.

How does S4 compare to other non-steroidal androgen receptor modulators in research applications?

A: S4 belongs to a chemically distinct non-steroidal scaffold class and exhibits a well-characterized androgen receptor interaction profile. Comparative investigations frequently utilize S4 alongside other AR modulators to examine differences in receptor binding characteristics, co-regulator interactions, transcriptional responses, and structure-activity relationships. Its extensive characterization has established it as a widely referenced compound in androgen receptor pharmacology research.

Why is S4 useful for androgen receptor signaling studies?

S4 has been extensively investigated as a model compound for examining androgen receptor activation, receptor-cofactor interactions, and downstream transcriptional regulation. Experimental studies have explored its effects on AR-mediated signaling networks, ligand-receptor binding dynamics, and pathway-specific regulatory systems. These properties make S4 a useful research tool for studies of androgen receptor biology, transcriptional control mechanisms, and non-steroidal receptor modulator pharmacology.

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