Catalog No. Size PriceQuantity
M13531-2 2mg solid $315
M13531-10 10mg solid $1,260


LE135 is a potent RAR antagonist that binds selectively to RARα (Ki of 1.4 μM) and RARβ (Ki of 220 nM), and has a higher affinity to RARβ. LE135 is highly selective over RARγ, RXRα, RXRβ and RXRγ. LE135 is also a potent TRPV1 and TRPA1 receptors activator with EC50s of 2.5 μM and 20 μM, respectively.

Product information

CAS Number: 155877-83-1

Molecular Weight: 438.56

Formula: C29H30N2O2

Chemical Name: 4-{2,14,14,17,17-pentamethyl-2,10-diazatetracyclo[³,⁸.0¹³,¹⁸]nonadeca-1(19),3,5,7,9,11,13(18)-heptaen-9-yl}benzoic acid

Smiles: CC1(C)CCC(C)(C)C2C=C3N=C(C4=CC=CC=C4N(C)C3=CC1=2)C1C=CC(=CC=1)C(O)=O


InChi: InChI=1S/C29H30N2O2/c1-28(2)14-15-29(3,4)22-17-25-23(16-21(22)28)30-26(18-10-12-19(13-11-18)27(32)33)20-8-6-7-9-24(20)31(25)5/h6-13,16-17H,14-15H2,1-5H3,(H,32,33)

Technical Data

Appearance: Solid Power

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

Solubility: Soluble in DMSO

Shipping Condition: Shipped under ambient temperature as non-hazardous chemical or refer to Certificate of Analysis

Storage Condition: Dry, dark and -20 oC for 1 year or refer to the Certificate of Analysis.

Shelf Life: ≥12 months if stored properly.

Stock Solution Storage: 0 - 4 oC for 1 month or refer to the Certificate of Analysis.

Drug Formulation: To be determined

HS Tariff Code: 382200

How to use

In Vitro:

LE135 inhibits Am80-induced differentiation of human promyelocytic leukemia cells HL-60 with an IC50 of 150 nM. LE135 inhibits retinoic acid (RA)-induced transcriptional activation of RARβ, but not RARα, RARγ or retinoid X receptor α (RXRα), on a variety of RA response elements. LE135 strongly represses 12-O-tetradecanoylphorbol-13-acetate-induced AP-1 activity in the presence of RARβ and RXRα.

In Vivo:

LE135 provokes nociceptive responses and elicited thermal hyperalgesia mainly through TRPV1 channels, but required both TRPA1 and TRPV1 channels for producing mechanical allodynia. Intraplantar injection of LE135 (30 nmol/10 μL) induces mechanical hypersensitivity in wild-type and Trpa1−/− mice.


  1. H Umemiya, et al. Regulation of retinoidal actions by diazepinylbenzoic acids. Retinoid synergists which activate the RXR-RAR heterodimers. J Med Chem. 1997 Dec 19;40(26):4222-34.
  2. Shijin Yin, et al. LE135, a retinoid acid receptor antagonist, produces pain through direct activation of TRP channels. Br J Pharmacol. 2014 Mar;171(6):1510-20.
  3. Y Li, et al. Identification of a novel class of retinoic acid receptor beta-selective retinoid antagonists and their inhibitory effects on AP-1 activity and retinoic acid-induced apoptosis in human breast cancer cells. J Biol Chem. 1999 May 28;274(22):15360-6.

Products are for research use only. Not for human use.

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