Description

L-Cysteinamide, D-phenylalanyl-L-cysteinyl-L-phenylalanyl-D-tryptophyl-L-lysyl-L-threonyl-N-[1-[(acetyloxy)methyl]-2-hydroxypropyl]-, cyclic (2→7)-disulfide, [R-(R*,R*)]- (9CI) CAS NO 133304-81-1 is a complex, synthetic peptide derivative featuring a cyclic disulfide bridge, which is critical for its structural stability and biological activity. This compound is of significant interest for advanced research and development in the life sciences sector due to its potential role as a molecular scaffold or a precursor in peptide-based therapeutics. It is primarily utilized by pharmaceutical R&D laboratories, biotechnology companies, and academic institutions engaged in peptide chemistry, drug discovery, and biochemical studies.

Application

• Pharmaceutical Research & Development: Serves as a key intermediate or a model compound in the synthesis of novel peptide-based drugs and bioactive molecules.
• Bioconjugation & Chemical Biology: Used as a building block for creating peptide-drug conjugates, probes, or labeled compounds for studying biological pathways.
• Peptide Library Synthesis: Employed in the generation of specialized peptide libraries for high-throughput screening against various therapeutic targets.
• Enzyme Inhibitor Studies: Investigated for its potential as a substrate analog or inhibitor in enzymatic assays and mechanism-of-action studies.
• Structural Biology: Utilized in research focused on protein folding, disulfide bond formation, and three-dimensional peptide structure analysis.
• Academic & Contract Research: A valuable reagent for advanced organic synthesis and peptide methodology development in academic and CRO settings.

Basic Information

Product Name	L-Cysteinamide, D-phenylalanyl-L-cysteinyl-L-phenylalanyl-D-tryptophyl-L-lysyl-L-threonyl-N-[1-[(acetyloxy)methyl]-2-hydroxypropyl]-, cyclic (2→7)-disulfide, [R-(R*,R*)]- (9CI)
CAS No.	133304-81-1
Molecular Formula	C55H71N11O11S2
Molecular Weight	1110.36 g/mol
Synonyms	Cyclo(D-Cys-Phe-D-Trp-Lys-Thr-Cys)-Nε-[(acetyloxy)methyl]-2-hydroxypropyl amide; [D-Cys1, Cys7]-Somatostatin-14 cyclic (1-7) disulfide derivative; Acetoxymethyl ester derivative of a cyclic somatostatin analog; Cyclic hexapeptide disulfide derivative; 133304-81-1; (9CI) designation peptide; Research peptide 133304-81-1
EINECS	Contact for details

Quality Control

Our products undergo rigorous quality testing to ensure compliance with industry standards. Certificates of Analysis (COA) are available upon request, detailing key parameters such as purity, identity, and impurity profiles. We adhere to strict in-house quality protocols suitable for research-grade biochemicals.

Storage

Preserve in a tightly closed container, protected from light. Store at -20°C or below in a dry environment. This product is hygroscopic (moisture-sensitive) and light-sensitive; prolonged exposure to ambient conditions should be avoided to maintain stability and purity. Allow the sealed container to reach room temperature before opening to minimize moisture condensation.

Specification

Item	Specification
Appearance	White to off-white powder
Identification (HPLC/MS)	Conforms
Purity (HPLC)	≥ 95.0%
Water Content (KF)	≤ 5.0%
Single Impurity (HPLC)	≤ 2.0%
Heavy Metals	≤ 20 ppm

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