WARNING: This product is for research use only, not for human or veterinary use.

MedKoo CAT#: 561209

CAS#: 160359-68-2

Description: Naltalimide, also known as TRK-130, is a unique µ-opioid receptor partial agonist. Naltalimide also enhances the bladder storage function by modulating the afferent limb of the micturition reflex through µ-opioid receptors in the spinal cord. Naltalimide could be a more effective and safer therapeutic agent with a different fashion from antimuscarinics and conventional opioids for overactive bladder.

Price and Availability




Naltalimide is not in stock, may be available through custom synthesis. For cost-effective reason, minimum 1 gram order is requested. The product will be characterized by NMR, HPLC and MS analysis. Purity (HPLC) is usually >98%. CoA, QC data, MSDS will be provided when product is successfully made. The estimated lead time is 2-3 months. Please send email to to inquire quote.

Chemical Structure


Theoretical Analysis

MedKoo Cat#: 561209
Name: Naltalimide
CAS#: 160359-68-2
Chemical Formula: C28H28N2O5
Exact Mass: 472.1998
Molecular Weight: 472.54
Elemental Analysis: C, 71.17; H, 5.97; N, 5.93; O, 16.93

Synonym: Naltalimide; TRK-130; TRK130; TRK 130

IUPAC/Chemical Name: N-[(5R, 6R, 14S)-17-(cyclopropylmethyl)-4, 5-epoxy-3,14-dihydroxymorphinan-6-yl] phthalimide


InChi Code: InChI=1S/C28H28N2O5/c31-20-8-7-16-13-21-28(34)10-9-19(30-25(32)17-3-1-2-4-18(17)26(30)33)24-27(28,22(16)23(20)35-24)11-12-29(21)14-15-5-6-15/h1-4,7-8,15,19,21,24,31,34H,5-6,9-14H2/t19-,21-,24+,27+,28-/m1/s1

SMILES Code: O=C(N1[C@H]2[C@@]3([H])[C@]45C6=C(O3)C(O)=CC=C6C[C@@H](N(CC7CC7)CC5)[C@]4(O)CC2)C8=CC=CC=C8C1=O

Technical Data

Solid powder

>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).

Soluble in DMSO

Shelf Life:
>2 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).

Harmonized System Code:


1: Fujimura M, Izumimoto N, Momen S, Yoshikawa S, Kobayashi R, Kanie S, Hirakata M, Komagata T, Okanishi S, Hashimoto T, Yoshimura N, Kawai K. Characteristics of TRK-130 (Naltalimide), a novel opioid ligand, as a new therapeutic agent for overactive bladder. J Pharmacol Exp Ther. 2014 Sep;350(3):543-51. doi: 10.1124/jpet.114.214031. Epub 2014 Jun 13. PubMed PMID: 24928951.

2: Atala A. Re: Characteristics of TRK-130 (naltalimide), a novel opioid ligand, as a new therapeutic agent for overactive bladder. J Urol. 2015 Mar;193(3):1060. doi: 10.1016/j.juro.2014.12.029. Epub 2014 Dec 18. PubMed PMID: 25765428.

3: Wein AJ. Re: Characteristics of TRK-130 (Naltalimide), a Novel Opioid Ligand, as a New Therapeutic Agent for Overactive Bladder. J Urol. 2016 Jan;195(1):223. doi: 10.1016/j.juro.2015.10.078. Epub 2015 Nov 21. PubMed PMID: 26699998.

4: Fujimura M, Izumimoto N, Kanie S, Kobayashi R, Yoshikawa S, Momen S, Hirakata M, Komagata T, Okanishi S, Iwata M, Hashimoto T, Doi T, Yoshimura N, Kawai K. Mechanisms of inhibitory action of TRK-130 (Naltalimide), a μ-opioid receptor partial agonist, on the micturition reflex. Int Urol Nephrol. 2017 Apr;49(4):587-595. doi: 10.1007/s11255-017-1509-y. Epub 2017 Jan 16. PubMed PMID: 28093646.