A 33
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MedKoo CAT#: 584987

CAS#: 915082-52-9

Description: A 33 is a potent and selective PDE4B inhibitor.


Chemical Structure

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A 33
CAS# 915082-52-9

Theoretical Analysis

MedKoo Cat#: 584987
Name: A 33
CAS#: 915082-52-9
Chemical Formula: C19H18ClN3O2S
Exact Mass: 387.08
Molecular Weight: 387.882
Elemental Analysis: C, 58.83; H, 4.68; Cl, 9.14; N, 10.83; O, 8.25; S, 8.27

Price and Availability

Size Price Availability Quantity
100mg USD 750 2 Weeks
200mg USD 1250 2 Weeks
500mg USD 2250 2 Weeks
1g USD 3650 2 Weeks
2g USD 5450 2 Weeks
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Related CAS #: 915082-52-9    

Synonym: A 33; A33; A-33

IUPAC/Chemical Name: 2-[4-[[2-(5-Chloro-2-thienyl)-5-ethyl-6-methyl-pyrimidin-4-yl]amino]phenyl]acetic acid

InChi Key: FDVSPBLZPJMXFV-UHFFFAOYSA-N

InChi Code: InChI=1S/C19H18ClN3O2S/c1-3-14-11(2)21-19(15-8-9-16(20)26-15)23-18(14)22-13-6-4-12(5-7-13)10-17(24)25/h4-9H,3,10H2,1-2H3,(H,24,25)(H,21,22,23)

SMILES Code: O=C(O)CC1=CC=C(NC2=NC(C3=CC=C(Cl)S3)=NC(C)=C2CC)C=C1

Appearance: Solid powder

Purity: >98% (or refer to the Certificate of Analysis)

Shipping Condition: Shipped under ambient temperature as non-hazardous chemical. This product is stable enough for a few weeks during ordinary shipping and time spent in Customs.

Storage Condition: Dry, dark and at 0 - 4 C for short term (days to weeks) or -20 C for long term (months to years).

Solubility: Soluble in DMSO

Shelf Life: >3 years if stored properly

Drug Formulation: This drug may be formulated in DMSO

Stock Solution Storage: 0 - 4 C for short term (days to weeks), or -20 C for long term (months).

HS Tariff Code: 2934.99.9001

More Info:

Biological target:
In vitro activity:
In vivo activity:

Preparing Stock Solutions

The following data is based on the product molecular weight 387.88 Batch specific molecular weights may vary from batch to batch due to the degree of hydration, which will affect the solvent volumes required to prepare stock solutions.

Recalculate based on batch purity %
Concentration / Solvent Volume / Mass 1 mg 5 mg 10 mg
1 mM 1.15 mL 5.76 mL 11.51 mL
5 mM 0.23 mL 1.15 mL 2.3 mL
10 mM 0.12 mL 0.58 mL 1.15 mL
50 mM 0.02 mL 0.12 mL 0.23 mL
Formulation protocol:
In vitro protocol:
In vivo protocol:

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Naganuma et al (2009) Discovery of selective PDE4B inhibitors. Bioorg.Med.Chem.Lett. 19 3174 PMID: 19447034

Zhang et al (2017) Comparison of the pharmacological profiles of selective PDE4B and PDE4D inhibitors in the central nervous system. Sci.Rep. 7 40115 PMID: 28054669

Wilson et al (2017) Therapeutic benefits of phosphodiesterase 4B inhibition after traumatic brain injury. PLoS One 12 e0178013 PMID: 28542295