GAT228
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MedKoo CAT#: 555580

CAS#: 1446648-15-2

Description: GAT228 is an allosteric agonist of cannabinoid receptor 1 (CB1), the R-(+)-enantiomer of the CB1 positive allosteric modulator (PAM) GAT229, and a component of the racemic mixture GAT211, which acts as both an agonist and PAM.


Chemical Structure

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GAT228
CAS# 1446648-15-2

Theoretical Analysis

MedKoo Cat#: 555580
Name: GAT228
CAS#: 1446648-15-2
Chemical Formula: C22H18N2O2
Exact Mass: 342.14
Molecular Weight: 342.398
Elemental Analysis: C, 77.17; H, 5.30; N, 8.18; O, 9.35

Price and Availability

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5mg USD 265
10mg USD 450
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Synonym: GAT228; GAT-228; GAT 228;

IUPAC/Chemical Name: 3-[(1R)-2-nitro-1-phenylethyl]-2-phenyl-1H-indole

InChi Key: OHZDCJJHWPHZJD-LJQANCHMSA-N

InChi Code: InChI=1S/C22H18N2O2/c25-24(26)15-19(16-9-3-1-4-10-16)21-18-13-7-8-14-20(18)23-22(21)17-11-5-2-6-12-17/h1-14,19,23H,15H2/t19-/m1/s1

SMILES Code: O=[N+](C[C@@H](C1=C(C2=CC=CC=C2)NC3=C1C=CC=C3)C4=CC=CC=C4)[O-]

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 342.40 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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1: Laprairie RB, Bagher AM, Rourke JL, Zrein A, Cairns EA, Kelly MEM, Sinal CJ, Kulkarni PM, Thakur GA, Denovan-Wright EM. Positive allosteric modulation of the type 1 cannabinoid receptor reduces the signs and symptoms of Huntington's disease in the R6/2 mouse model. Neuropharmacology. 2019 Jun;151:1-12. doi: 10.1016/j.neuropharm.2019.03.033. Epub 2019 Mar 30. PubMed PMID: 30940536; PubMed Central PMCID: PMC6544167.

2: Saleh N, Hucke O, Kramer G, Schmidt E, Montel F, Lipinski R, Ferger B, Clark T, Hildebrand PW, Tautermann CS. Multiple Binding Sites Contribute to the Mechanism of Mixed Agonistic and Positive Allosteric Modulators of the Cannabinoid CB1 Receptor. Angew Chem Int Ed Engl. 2018 Mar 1;57(10):2580-2585. doi: 10.1002/anie.201708764. Epub 2018 Feb 2. PubMed PMID: 29314474.

3: Mitjavila J, Yin D, Kulkarni PM, Zanato C, Thakur GA, Ross R, Greig I, Mackie K, Straiker A. Enantiomer-specific positive allosteric modulation of CB(1) signaling in autaptic hippocampal neurons. Pharmacol Res. 2018 Mar;129:475-481. doi: 10.1016/j.phrs.2017.11.019. Epub 2017 Nov 20. PubMed PMID: 29158048; PubMed Central PMCID: PMC5828971.

4: Cairns EA, Szczesniak AM, Straiker AJ, Kulkarni PM, Pertwee RG, Thakur GA, Baldridge WH, Kelly MEM. The In Vivo Effects of the CB(1)-Positive Allosteric Modulator GAT229 on Intraocular Pressure in Ocular Normotensive and Hypertensive Mice. J Ocul Pharmacol Ther. 2017 Oct;33(8):582-590. doi: 10.1089/jop.2017.0037. Epub 2017 Jul 18. PubMed PMID: 28719234; PubMed Central PMCID: PMC5649393.

5: Laprairie RB, Kulkarni PM, Deschamps JR, Kelly MEM, Janero DR, Cascio MG, Stevenson LA, Pertwee RG, Kenakin TP, Denovan-Wright EM, Thakur GA. Enantiospecific Allosteric Modulation of Cannabinoid 1 Receptor. ACS Chem Neurosci. 2017 Jun 21;8(6):1188-1203. doi: 10.1021/acschemneuro.6b00310. Epub 2017 Feb 7. PubMed PMID: 28103441.