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Details

Stereochemistry ABSOLUTE
Molecular Formula C4H5NO3S
Molecular Weight 147.152
Optical Activity UNSPECIFIED
Defined Stereocenters 1 / 1
E/Z Centers 0
Charge 0

SHOW SMILES / InChI
Structure of OXOTHIAZOLIDINECARBOXYLIC ACID

SMILES

OC(=O)[C@@H]1CSC(=O)N1

InChI

InChIKey=BMLMGCPTLHPWPY-REOHCLBHSA-N
InChI=1S/C4H5NO3S/c6-3(7)2-1-9-4(8)5-2/h2H,1H2,(H,5,8)(H,6,7)/t2-/m0/s1

HIDE SMILES / InChI
Oxothiazolidinecarboxylic Acid (L-2-oxothiazolidine-4-carboxylic acid, OTC) was currently undergoing evaluation in a Phase II clinical trial. It is suggested that an ideal drug may be an antisense oligonucleotide that blocks the expression of glycolate oxidase, a key enzyme in hepatic oxalate synthesis.

CNS Activity

Curator's Comment: Procysteine enters CSF after both IV and oral dosing and accumulates to significant levels in CSF. It was also observed that CSF levels of glutathione fall dramatically with aging.

Approval Year

Cmax

Cmax

ValueDoseCo-administeredAnalytePopulation
105 nmol/mL
500 mg single, oral
dose: 500 mg
route of administration: Oral
experiment type: SINGLE
co-administered:
OXOTHIAZOLIDINECARBOXYLIC ACID plasma
Homo sapiens
population: UNHEALTHY
age: ADULT
sex: UNKNOWN
food status: FASTED
242 nmol/mL
1500 mg single, oral
dose: 1500 mg
route of administration: Oral
experiment type: SINGLE
co-administered:
OXOTHIAZOLIDINECARBOXYLIC ACID plasma
Homo sapiens
population: UNHEALTHY
age: ADULT
sex: UNKNOWN
food status: FASTED
734 nmol/mL
4500 mg single, oral
dose: 4500 mg
route of administration: Oral
experiment type: SINGLE
co-administered:
OXOTHIAZOLIDINECARBOXYLIC ACID plasma
Homo sapiens
population: UNHEALTHY
age: ADULT
sex: UNKNOWN
food status: FASTED
AUC

AUC

ValueDoseCo-administeredAnalytePopulation
88 nmol × h/mL
500 mg single, oral
dose: 500 mg
route of administration: Oral
experiment type: SINGLE
co-administered:
OXOTHIAZOLIDINECARBOXYLIC ACID plasma
Homo sapiens
population: UNHEALTHY
age: ADULT
sex: UNKNOWN
food status: FASTED
428 nmol × h/mL
1500 mg single, oral
dose: 1500 mg
route of administration: Oral
experiment type: SINGLE
co-administered:
OXOTHIAZOLIDINECARBOXYLIC ACID plasma
Homo sapiens
population: UNHEALTHY
age: ADULT
sex: UNKNOWN
food status: FASTED
4063 nmol × h/mL
4500 mg single, oral
dose: 4500 mg
route of administration: Oral
experiment type: SINGLE
co-administered:
OXOTHIAZOLIDINECARBOXYLIC ACID plasma
Homo sapiens
population: UNHEALTHY
age: ADULT
sex: UNKNOWN
food status: FASTED
Doses

Doses

DosePopulationAdverse events​
100 mg/kg 1 times / 8 hours multiple, intravenous
Highest studied dose
Dose: 100 mg/kg, 1 times / 8 hours
Route: intravenous
Route: multiple
Dose: 100 mg/kg, 1 times / 8 hours
Sources:
healthy, ADULT
Health Status: healthy
Age Group: ADULT
Sex: M
Food Status: UNKNOWN
Sources:
0.5 g 3 times / day multiple, oral
Studied dose
Dose: 0.5 g, 3 times / day
Route: oral
Route: multiple
Dose: 0.5 g, 3 times / day
Sources:
unhealthy, ADULT
Health Status: unhealthy
Age Group: ADULT
Sex: M+F
Food Status: FED
Sources:
Sourcing

Sourcing

Vendor/AggregatorIDURL
PubMed

PubMed

TitleDatePubMed
Dietary antioxidants prevent alcohol-induced ciliary dysfunction.
2013-12
The pharmacokinetics and pharmaco-dynamics of Procysteine in amyotrophic lateral sclerosis.
1999-04-22
L-2-oxothiazolidine-4-carboxylic acid, a cysteine prodrug: pharmacokinetics and effects on thiols in plasma and lymphocytes in human.
1991-04
Patents

Sample Use Guides

Oxothiazolidinecarboxylic Acid (L-2-oxothiazolidine-4-carboxylic acid, OTC), a prodrug of cysteine, was administered at a dose of 0.15 and 0.45 mmol/kg to healthy volunteers. The plasma concentration of OTC reached a peak between 45 and 60 min after p.o. administration.
Route of Administration: Oral
In Vitro Use Guide
Oxothiazolidinecarboxylic Acid (L-2-oxothiazolidine-4-carboxylic acid, OTC) was tested at concentrations of 5, 10, and 20 mM for its effect on acute and chronic HIV-1 infection as measured by RT activity in MDM isolated from adult peripheral blood and cord blood. Addition of OTC at a concentration of 10 or 20 mM to chronically infected cord blood MDM cultures also suppressed RT activity during the subsequent course of infection.
Name Type Language
L-2-OXO-4-THIAZOLIDINECARBOXYLIC ACID
MI  
Preferred Name English
OXOTHIAZOLIDINECARBOXYLIC ACID
INCI  
INCI  
Official Name English
(R)-2-OXOTHIAZOLIDINE-4-CARBOXYLIC ACID
Systematic Name English
2-OXO-L-THIAZOLIDINE-4-CARBOXYLIC ACID
Common Name English
4-THIAZOLIDINECARBOXYLIC ACID, 2-OXO-, (R)-
Common Name English
(-)-2-OXO-4-THIAZOLIDINECARBOXYLIC ACID
Systematic Name English
L-2-OXO-4-THIAZOLIDINECARBOXYLIC ACID [MI]
Common Name English
(R)-(-)-2-OXOTHIAZOLIDINE-4-CARBOXYLIC ACID
Systematic Name English
L-2-OXOTHIAZOLIDINE-4-CARBOXYLIC ACID
Brand Name English
(4R)-2-OXO-1,3-THIAZOLIDINE-4-CARBOXYLIC ACID
Systematic Name English
2-OXO-4-THIAZOLIDINECARBOXYLIC ACID, L-
Common Name English
KOPROSTEINE
Brand Name English
(4R)-2-OXOTHIAZOLIDINE-4-CARBOXYLIC ACID
Systematic Name English
PROCYSTEINE
Common Name English
R-2-OXO-1,3-THIAZOLIDINE-4-CARBOXYLIC ACID
Common Name English
4-THIAZOLIDINECARBOXYLIC ACID, 2-OXO-, (4R)-
Common Name English
4-THIAZOLIDINECARBOXYLIC ACID, 2-OXO-, L-
Common Name English
Classification Tree Code System Code
FDA ORPHAN DRUG 99296
Created by admin on Mon Mar 31 21:02:25 GMT 2025 , Edited by admin on Mon Mar 31 21:02:25 GMT 2025
FDA ORPHAN DRUG 81994
Created by admin on Mon Mar 31 21:02:25 GMT 2025 , Edited by admin on Mon Mar 31 21:02:25 GMT 2025
Code System Code Type Description
MERCK INDEX
m8319
Created by admin on Mon Mar 31 21:02:25 GMT 2025 , Edited by admin on Mon Mar 31 21:02:25 GMT 2025
PRIMARY Merck Index
DAILYMED
X7063P804E
Created by admin on Mon Mar 31 21:02:25 GMT 2025 , Edited by admin on Mon Mar 31 21:02:25 GMT 2025
PRIMARY
CAS
19771-63-2
Created by admin on Mon Mar 31 21:02:25 GMT 2025 , Edited by admin on Mon Mar 31 21:02:25 GMT 2025
PRIMARY
FDA UNII
X7063P804E
Created by admin on Mon Mar 31 21:02:25 GMT 2025 , Edited by admin on Mon Mar 31 21:02:25 GMT 2025
PRIMARY
EPA CompTox
DTXSID501318247
Created by admin on Mon Mar 31 21:02:25 GMT 2025 , Edited by admin on Mon Mar 31 21:02:25 GMT 2025
PRIMARY
RXCUI
1926836
Created by admin on Mon Mar 31 21:02:25 GMT 2025 , Edited by admin on Mon Mar 31 21:02:25 GMT 2025
PRIMARY
PUBCHEM
72390
Created by admin on Mon Mar 31 21:02:25 GMT 2025 , Edited by admin on Mon Mar 31 21:02:25 GMT 2025
PRIMARY
DRUG BANK
DB12224
Created by admin on Mon Mar 31 21:02:25 GMT 2025 , Edited by admin on Mon Mar 31 21:02:25 GMT 2025
PRIMARY
SMS_ID
300000051227
Created by admin on Mon Mar 31 21:02:25 GMT 2025 , Edited by admin on Mon Mar 31 21:02:25 GMT 2025
PRIMARY