Levodopa Related Compounds & Impurities

Levodopa is the immediate metabolic precursor of dopamine that crosses the blood-brain barrier, the most effective agent for Parkinson's disease motor symptoms.

Simson Pharma Limited along with its subsidiary offices Simson Pharma Global Ltd. (UK) and Simson Pharma Global LLC (USA) is a trusted manufacturer and supplier of high-quality pharmaceutical reference standards, offering a comprehensive portfolio of Levodopa reference standards, pharmacopeial and non-pharmacopeial Levodopa impurities, related compounds, related substances, metabolites, stable isotope-labelled compounds, deuterium labelled compounds and nitrosamine (N-NO) reference standards.

These materials support pharmaceutical research and development, product development, ANDA and DMF submissions, quality control (QC), analytical method development and validation, stability studies, impurity identification, and genotoxic impurity assessment.

Our Levodopa-related reference standards are thoroughly characterized using advanced analytical techniques and are supplied with comprehensive Certificates of Analysis (COA) and supporting analytical data from our USFDA certified, ISO 17025 and ISO 17034 accredited Lab, to meet global regulatory expectations. EP and USP traceable reference standards can also be provided upon request, subject to availability. Simson is also a provider of EP and USP traceable standards. To ensure consistent quality and reliability, our reference standards are periodically re-tested according to established quality management procedures.

Pharmaceutical Reference Standards / Impurity Standards

Levodopa
3-Acetyl-L-Tyrosine Hydrochloride
3,4 Dimethyl L-Phenylalanin alfge
Levodopa EP Impurity C
3-Methoxy-L-tyrosine Methyl Ester
Levodopa EP Impurity A
Levodopa EP Impurity D
Levodopa Impurity 4
Levodopa EP Impurity B
N,N-DiMethyl-L-phenylalanine
Levodopa Related Compound B Hydrochloride Salt
Levodopa Impurity 1
(1S,3S)-6,7-Dihydroxy-1-methyl-1,2,3,4-tetrahydroisoquinoline-1,3-dicarboxylic acid
(1R,3S)-6,7-Dihydroxy-1-methyl-1,2,3,4-tetrahydroisoquinoline-1,3-dicarboxylic acid
Leucodopachrome
Etilevodopa
Levodopa Impurity 7
Levodopa Isopropyl Ester Impurity

Metabolites

L-Dopa Methyl Ester Hydrochloride

Isotope Labelled Compounds

Levodopa-D3
Levodopa-D3 Deuterium Chloride
L-Dopa-2,5,6,alpha,beta,beta-D6