Description

n-Acetyl-S-[[5,8-Dihydro-1-Hydroxy-7-(Hydroxymethyl)-3,6-Dimethoxy-5,8-Dioxonaphthalen-2-Yl]Methyl]-L-Cysteine is a specialized, high-purity biochemical building block derived from L-cysteine and a complex naphthoquinone derivative. This compound matters for its role as a key intermediate in advanced pharmaceutical research and synthesis, particularly in developing targeted therapies and enzyme inhibitors. It is primarily needed by R&D chemists and process development scientists in the pharmaceutical, biotechnology, and fine chemical industries for applications requiring precise molecular modification.

Application

• Pharmaceutical Intermediate: Critical building block for the synthesis of novel drug candidates, particularly in oncology and anti-infective research.
• Biochemical Research: Used in proteomics and enzyme studies as a tool compound for investigating cysteine-related biological pathways.
• Conjugate Chemistry: Serves as a linker or spacer molecule in the development of antibody-drug conjugates (ADCs) and other bioconjugates.
• Precursor for Specialty Chemicals: Employed in the synthesis of complex molecules for material science and advanced organic chemistry applications.
• Reference Standard: Utilized as a high-purity analytical standard in quality control laboratories for method development and validation.

Basic Information

Item	Details
Product Name	n-Acetyl-S-[[5,8-Dihydro-1-Hydroxy-7-(Hydroxymethyl)-3,6-Dimethoxy-5,8-Dioxonaphthalen-2-Yl]Methyl]-L-Cysteine
CAS No.	91776-45-3
Molecular Formula	C19H21NO10S
Molecular Weight	455.44 g/mol
Synonyms	N-Acetyl-S-(5,8-dihydro-1-hydroxy-7-(hydroxymethyl)-3,6-dimethoxy-5,8-dioxonaphthalen-2-yl)methyl-L-cysteine; N-Acetylcysteine derivative of 2-hydroxymethyljuglone; Acetylcysteine juglone conjugate; L-Cysteine, N-acetyl-, S-[[5,8-dihydro-1-hydroxy-7-(hydroxymethyl)-3,6-dimethoxy-5,8-dioxo-2-naphthalenyl]methyl]-; 2-[(Acetylcysteinyl)methyl]-5,8-dihydro-1-hydroxy-7-(hydroxymethyl)-3,6-dimethoxynaphthalene-5,8-dione
EINECS	Contact for details

Quality Control

Our n-Acetyl-S-[[5,8-Dihydro-1-Hydroxy-7-(Hydroxymethyl)-3,6-Dimethoxy-5,8-Dioxonaphthalen-2-Yl]Methyl]-L-Cysteine is manufactured under strict quality management systems. Each batch undergoes rigorous analytical testing to ensure high purity and identity, with specifications aligned with research-grade standards. Comprehensive Certificates of Analysis (COA) detailing purity, assay, and impurity profiles are available upon request to support your regulatory and quality assurance needs.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry place at a controlled room temperature (15-25°C). Due to its hygroscopic and easily oxidized nature, it is recommended to store the product under an inert atmosphere (e.g., nitrogen or argon) after opening to maximize shelf-life and stability. Keep the container tightly sealed when not in use to prevent moisture absorption.

Specification

Item	Specification
Appearance	Yellow to light brown powder
Identification (IR)	Conforms to structure
Identification (HPLC)	Conforms to reference
Assay (HPLC)	≥ 95.0%
Water Content (KF)	≤ 2.0%
Residue on Ignition	≤ 0.5%

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