An Analytical Reference Standard
Technical Support & Resources

Visit our FAQ

Contact Us

Toll Free Phone (USA and Canada Only): (888) 526-5351
Direct Phone: (734) 975-3888

Request Technical Support

Technical Support Request

To streamline the process attach the appropriate questionnaire to your inquiry.

Download IHC QuestionnaireDownload WB Questionnaire

View Our Privacy Statement for details on how we use and protect your data. In addition, this site is protected by hCaptcha and its Privacy Policy and Terms of Service apply.

UR-144 N-(5-chloropentyl) analog

Item No. 11951

Product Insert (PDF)GC-MS (PDF)Safety Data Sheet (SDS) (PDF)
Technical Information
Formal Name
(1-(5-chloropentyl)-1H-indol-3-yl)(2,2,3,3-tetramethylcyclopropyl)methanone
CAS Number
1445577-42-3
Molecular Formula
C21H28ClNO
Formula Weight
345.9
Purity
≥98%
Formulation
A crystalline solid
Solubility(Learn about Variance in Solubility)
DMF: 14 mg/mlDMF:PBS(pH7.2) (1:2): 0.3 mg/mlDMSO: 5 mg/mlEthanol: 5 mg/ml
λmax
218, 246, 304 nm
SMILES
O=C(C1C(C)(C)C1(C)C)C2=CN(CCCCCCl)C3=C2C=CC=C3
InChi Code
InChI=1S/C21H28ClNO/c1-20(2)19(21(20,3)4)18(24)16-14-23(13-9-5-8-12-22)17-11-7-6-10-15(16)17/h6-7,10-11,14,19H,5,8-9,12-13H2,1-4H3
InChi Key
CKIOITGXSRFWIS-UHFFFAOYSA-N
Shipping & Storage Information
Storage
-20°C
Shipping
Room temperature in continental US; may vary elsewhere
Recommended Products

Certificates of Analysis & Batch Specific Data

Provide batch numbers separated by commas to download or request available product inserts, QC sheets, certificates of analysis, data packs, and GC-MS data.

Download most recent Certificate of Analysis for this product

    1 mg

    $90

    Add

    5 mg

    $392

    Add

    10 mg

    $696

    Add
    Cayman Chemical
    Cayman Spectral Library

    Our free, searchable, GC-MS spectral database contains 70eV EI mass spectral data of 2,000+ of Cayman’s forensic drug standards.

    DOWNLOAD THE DATABASE
    Product Description

    UR-144 (Item No. 11502) is a potent synthetic cannabinoid (CB) which preferentially binds the peripheral CB2 receptor (Ki = 1.8 nM) over the central CB1 receptor (Ki = 150 nM).1 UR-144 N-(5-chloropentyl) analog differs from UR-144 by having a chlorine atom on the terminal carbon of the alkyl group. The biological activities of this compound have not been characterized. This product is intended for forensic and research applications.

    WARNING This product is not for human or veterinary use.

    References & Product Citations
    Product Description References

    1. Frost, J.M., Dart, M.J., Tietje, K.R., et al. Indol-3-ylcycloalkyl ketones: Effects of N1 substituted indole side chain variations on CB2 cannabinoid receptor activity. J. Med. Chem. 53(1), 295-315 (2010).

    Product Citations

    Mercier, G., Mohamed, K.A., Zagzoog, A., et al. In vitro pharmacological activity of twenty-eight synthetic cannabinoid receptor agonists at the type 1 and 2 cannabinoid receptors. Neurochem. Int. 190, 106039 (2025).