4-MERCAPTO-2-PYRROLIDINONE, (4R)-
UNII K2RS44I3DB

Substance Identification & Data

This profile provides standardized clinical and technical data for 4-mercapto-2-pyrrolidinone, (4r)-, uniquely identified by the FDA Unique Ingredient Identifier (UNII) K2RS44I3DB.

Technical mappings include the Chemical Abstracts Service (CAS) Registry Number 157429-42-0 and the RxNorm Concept ID (RxCUI) N/A. Explore the sections below for detailed nomenclature and a complete directory of NDC-listed products containing this ingredient.

FDA UNII Code

K2RS44I3DB

CAS Registry Number

157429-42-0

RxNorm Concept ID

N/A

Detailed Substance Profile

Preferred Name

4-MERCAPTO-2-PYRROLIDINONE, (4R)-

Official standardized name for this substance within the FDA UNII nomenclature system.

InChIKey

C4H7NOS

International Chemical Identifier digital signature for unique molecular identification.

SMILES String

RADPGJBZLCMARV-GSVOUGTGSA-N

Line notation for describing the chemical structure and connectivity of atoms.

PubChem CID

10486831

Unique identification number in the NCBI database of chemical substances.

Substance Type

chemical

ISO 11238 classification category (e.g., Chemical, Polymer, Protein).

Ingredient Role

N1C(C[C@H](C1)S)=O

Synonyms and Nomenclature

This section provides a complete list of nomenclature and identifier mappings for 4-mercapto-2-pyrrolidinone, (4r)-. Identifiers are organized into official regulatory terms, commercial trade names, and technical systematic synonyms used to ensure accurate identification across clinical pharmaceutical databases, regulatory filings, and electronic health records.