Description

l-Cysteine, S-[(acetylamino)methyl]-N-[N-[N-[N-[N-[N6-[[2-(methylsulfonyl)ethoxy]carbonyl]-l-lysyl]-l-threonyl]-l-phenylalanyl]-l-threonyl]-l-seryl]-, 2-[[[4-(phenylazo)phenyl]methyl]sulfonyl]ethyl ester, mono(trifluoroacetate) (salt) is a complex, custom-designed peptide derivative used as a critical intermediate in advanced pharmaceutical research and development. Its value lies in its precisely engineered structure, which incorporates specific protecting groups and a chromophore, making it essential for synthesizing and studying novel bioactive peptides and potential therapeutic agents. This high-purity compound is primarily needed by research institutions, biotechnology firms, and pharmaceutical companies engaged in peptide chemistry, drug discovery, and the development of targeted therapies.

Application

• Pharmaceutical Intermediate: Serves as a key building block in the solid-phase or solution-phase synthesis of complex, research-stage peptide drugs.
• Drug Discovery Research: Used in medicinal chemistry programs to create novel peptide analogs for screening against biological targets.
• Bioconjugation Studies: The incorporated chromophore (phenylazo group) and specific ester linkages make it suitable for developing peptide-based probes, labels, or conjugates for diagnostic or research purposes.
• Protecting Group Chemistry: Functions as a specialized intermediate where specific protecting groups (e.g., the methylsulfonylethoxycarbonyl group on lysine) are required for selective peptide chain assembly.
• Academic & Institutional Research: Employed in university and institutional labs for fundamental studies in peptide synthesis methodology and structure-activity relationships (SAR).

Basic Information

Item	Details
Product Name	l-Cysteine, S-[(acetylamino)methyl]-N-[N-[N-[N-[N-[N6-[[2-(methylsulfonyl)ethoxy]carbonyl]-l-lysyl]-l-threonyl]-l-phenylalanyl]-l-threonyl]-l-seryl]-, 2-[[[4-(phenylazo)phenyl]methyl]sulfonyl]ethyl ester, mono(trifluoroacetate) (salt)
CAS No.	76408-71-4
Molecular Formula	Contact for details
Molecular Weight	Contact for details
Synonyms	N6-[[2-(Methylsulfonyl)ethoxy]carbonyl]-L-lysyl-L-threonyl-L-phenylalanyl-L-threonyl-L-seryl-S-[(acetylamino)methyl]-L-cysteine 2-[[[4-(Phenylazo)phenyl]methyl]sulfonyl]ethyl Ester Trifluoroacetate; Custom Peptide Derivative 76408-71-4; Chromophore-Labeled Peptide Intermediate; MSEC-Lys Protected Peptide Intermediate; Peptide Building Block with Phenylazo Chromophore
EINECS	Contact for details

Quality Control

This high-value research chemical is produced under strict quality control protocols to ensure batch-to-batch consistency and identity. Each lot is characterized using advanced analytical techniques, including HPLC for purity assessment and mass spectrometry for structural confirmation. A comprehensive Certificate of Analysis (COA) detailing purity, identity, and related substances is provided with every shipment to support your critical research and development work.

Storage

Preserve in a tightly closed container, protected from light. Store at -20°C or below in a freezer. This compound is hygroscopic (moisture-sensitive); allow the sealed container to equilibrate to room temperature before opening to minimize condensation and moisture uptake. For long-term storage, consider under an inert atmosphere.

Specification

Item	Specification
Appearance	Solid (color to be specified per lot)
Identification (HPLC/MS)	Conforms
Purity (HPLC)	≥ 95% (Area Percent)
Related Substances (HPLC)	Individual unspecified impurity ≤ 2.0%
Water Content (KF)	≤ 5.0%
Residual Solvents (GC)	Meets ICH guidelines

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.