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Heterocyclic building blocks

(±)-Monastrol

Also known as (+-)-Monastrol, DL-Monastrol, Ethyl 4-(3-hydroxyphenyl)-6-methyl-2-thioxo-1,2,3,4-tetrahydropyrimidine-5-carboxylate

CAS 329689-23-8Formula C14H16N2O3SMolar mass 292.36 g/mol
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(±)-Monastrol chemical structure, C14H16N2O3S, CAS 329689-23-8
2D chemical structure

Key facts

What buyers check first

All properties
CAS number
329689-23-8
Formula
C14H16N2O3S
Molar mass
292.36 g/mol
HS code
293359
Category
Heterocyclic building blocks

What is (±)-Monastrol?

Plain description, key identifiers and synonyms

Monastrol is a racemate comprising equimolar amounts of R- and S-monastrol. It has a role as an antineoplastic agent, an EC 3.5.1.5 (urease) inhibitor, an antimitotic and an antileishmanial agent. It contains a (R)-monastrol and a (S)-monastrol.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
ethyl 4-(3-hydroxyphenyl)-6-methyl-2-sulfanylidene-3,4-dihydro-1H-pyrimidine-5-carboxylate
CAS number
329689-23-8Other or deprecated CAS: 254753-54-3
Molecular formula
C14H16N2O3S
MDL number
MFCD00813077
InChIKey
LOBCDGHHHHGHFA-UHFFFAOYSA-N
InChI
InChI=1S/C14H16N2O3S/c1-3-19-13(18)11-8(2)15-14(20)16-12(11)9-5-4-6-10(17)7-9/h4-7,12,17H,3H2,1-2H3,(H2,15,16,20)
SMILES (canonical and isomeric)
CCOC(=O)C1=C(NC(=S)NC1C2=CC(=CC=C2)O)C

Synonyms

  • (+-)-Monastrol
  • DL-Monastrol
  • Ethyl 4-(3-hydroxyphenyl)-6-methyl-2-thioxo-1,2,3,4-tetrahydropyrimidine-5-carboxylate
  • ()-Monastrol
  • ethyl 4-(3-hydroxyphenyl)-6-methyl-2-sulfanylidene-1,2,3,4-tetrahydropyrimidine-5-carboxylate
  • ethyl 4-(3-hydroxyphenyl)-6-methyl-2-sulfanylidene-3,4-dihydro-1H-pyrimidine-5-carboxylate
  • (+/-)-Monastrol
  • 5-Pyrimidinecarboxylic acid,1,2,3,4-tetrahydro-4-(3-hydroxyphenyl)-6-methyl-2-thioxo-, ethyl ester
  • 5-Pyrimidinecarboxylic acid, 1,2,3,4-tetrahydro-4-(3-hydroxyphenyl)-6-methyl-2-thioxo-, ethyl ester
  • Monastrol?
  • 4-(3-Hydroxyphenyl)-6-methyl-2-thioxo-1,2,3,4-tetrahydro-4H-pyrimidin-5-carboxylic Acid Ethyl Ester
  • (+/-)-Monastro
  • (A+/-)-Monastrol
  • Monastrol, >=98%
  • MONASTROL (Free base)
  • Probes1_000001
  • Probes1_000042
  • Probes1_000312
  • Probes2_000257
  • Probes2_000376
  • Bio1_000459
  • Bio1_000948
  • Bio1_001437
  • Bio2_000467
  • Bio2_000947
Show all 33 synonyms
  • Monastrol, >=98% (HPLC), solid
  • 1,2,3,4-Tetrahydro-4-(3-hydroxyphenyl)-6-methyl-2-thioxo-5-pyrimidinecarboxylic acid, ethyl ester
  • ethyl 4-(3-hydroxyphenyl)-6-methyl-2-sulfanyl-1,4-dihydropyrimidine-5-carboxylate
  • Ethyl 4-(3-hydroxyphenyl)-6-methyl-2-thioxo-1,2,3,4-tetrahydro-4H-pyrimidin-5-carboxylate
  • ethyl 4-(3-hydroxyphenyl)-6-methyl-2-thioxo-3,4-dihydro-1H-pyrimidine-5-carboxylate
  • ethyl 6-(3-hydroxyphenyl)-2-mercapto-4-methyl-1,6-dihydropyrimidine-5-carboxylate
  • ethyl 6-(3-hydroxyphenyl)-4-methyl-2-thioxo-1,3,6-trihydropyrimidine-5-carboxy late
  • ethyl 6-methyl-4-(3-hydroxyphenyl)-2-thioxo-1,2,3,4-tetrahydropyrimidine-5-carboxylate

Physical and chemical properties

Measured values and descriptors computed from the structure

Physical and chemical properties

Measured values, check the supplier specification for your grade

No measured properties are recorded for this substance yet. Ask suppliers for a technical data sheet.

Values vary by grade. Ask suppliers for the COA or TDS of the batch you buy.

Computed descriptors

Calculated from the structure, useful for screening and formulation

Molecular weight
292.36 g/molcalc.
Exact mass
292.0882 Dacalc.
LogP (octanol/water)
1.75calc.
Topological polar surface area
70.59 Ųcalc.
Hydrogen bond donors
3calc.
Hydrogen bond acceptors
4calc.
Rotatable bonds
3calc.
Heavy atoms
20calc.
Rings
2calc.
Aromatic rings
1calc.
Fraction sp3 carbons
0.29calc.
Formal charge
0calc.
Stereocentres
1calc.
Lipinski rule of five
Passes (0 violations)calc.

Calculated for screening. Confirm critical figures with the supplier.

Murcko scaffold

The ring system that remains when every side chain is removed

Murcko scaffold of this chemical, S=C1NC=CC(c2ccccc2)N1

S=C1NC=CC(c2ccccc2)N1

2 rings, 13 atoms.

229 other chemicals share this scaffold

Safety and hazards

GHS classification summary, not a safety data sheet

No GHS hazard classification is recorded for this substance yet. That does not mean it is harmless.

GHS classification summary, not a safety data sheet (SDS). Classifications can differ by supplier, grade and concentration. Always check the supplier's SDS.

(±)-Monastrol suppliers

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All 5 suppliers
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Where suppliers are based

5 suppliers in 2 countries

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(±)-Monastrol price

Indicative price range per kg from live supplier offers

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Uses and applications

What the substance is used for, by industry and function

Roles

  • antiinfective agent
  • antileishmanial agent
  • antimicrobial agent
  • antimicrobial drug
  • antimitotic
  • antineoplastic agent
  • antiparasitic agent
  • antiprotozoal drug
  • enzyme inhibitor
  • pharmaceutical

Regulatory status

Inventories, regulations and trade controls that list this substance

No regulatory list memberships are recorded for this substance yet. Always check the rules of the importing and exporting country before trade.

HS code and trade data

Customs classification and reported world trade statistics

Global trade

World import and export statistics for the HS code (±)-Monastrol is traded under.

HS 2933.59Indicative HS code

Compounds containing a pyrimidine ring (whether or not hydrogenated) or piperazine ring, other

World exports in 2024
$18.4B
+10.5% vs 2023, imports $24.8B
2019 to 2024
Top exporters
  1. Ireland43.6%
  2. Switzerland * partner reported26.3%
  3. China7.9%
Top importers
  1. Slovenia30.3%
  2. United States30.1%
  3. Germany15.3%

* Partner reported figures, a lower bound.

Reported customs values in USD, not prices.Full trade data

The HS code shown for (±)-Monastrol is indicative (it was assigned by structure rules). Confirm the classification with your customs broker before shipping.

Frequently asked questions

Quick answers about (±)-Monastrol, based on the data on this page

What is (±)-Monastrol?

Monastrol is a racemate comprising equimolar amounts of R- and S-monastrol. It has a role as an antineoplastic agent, an EC 3.5.1.5 (urease) inhibitor, an antimitotic and an antileishmanial agent. It contains a (R)-monastrol and a (S)-monastrol.

Guides for buyers

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Data last updated 7 Oct 2026. Details may have changed, please confirm them with the supplier. Report an error on this page
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