Q-203 Ditosylate

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

MedKoo CAT#: 527206

CAS#: 1566517-83-6 (Ditosylate)

Description: Q-203 Ditosylate, also known as Q-203, is a mycobacterium tuberculosis protein potentially for the treatment of tuberculosis. The optimized IPA compound Q203 inhibited the growth of MDR and XDR M. tuberculosis clinical isolates in culture broth medium in the low nanomolar range and was efficacious in a mouse model of tuberculosis at a dose less than 1 mg per kg body weight, which highlights the potency of this compound.

Price and Availability




Q-203 ditosylate is not in stock, but 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 sales@medkoo.com to inquire quote.

Chemical Structure


Theoretical Analysis

MedKoo Cat#: 527206
Name: Q-203 Ditosylate
CAS#: 1566517-83-6 (Ditosylate)
Chemical Formula: C43H44ClF3N4O8S2
Exact Mass:
Molecular Weight: 901.4102
Elemental Analysis: C, 57.30; H, 4.92; Cl, 3.93; F, 6.32; N, 6.22; O, 14.20; S, 7.11

Related CAS #: 1334719-95-7 (free base)   1566517-83-6 (Ditosylate)  

Synonym: Q-203; Q 203; Q203; Q-203 ditosylate;

IUPAC/Chemical Name: 6-chloro-2-ethyl-N-(4-(4-(4-(trifluoromethoxy)phenyl)piperidin-1-yl)benzyl)imidazo[1,2-a]pyridine-3-carboxamide bis(4-methylbenzenesulfonate)


InChi Code: InChI=1S/C29H28ClF3N4O2.2C7H8O3S/c1-2-25-27(37-18-22(30)7-12-26(37)35-25)28(38)34-17-19-3-8-23(9-4-19)36-15-13-21(14-16-36)20-5-10-24(11-6-20)39-29(31,32)33;2*1-6-2-4-7(5-3-6)11(8,9)10/h3-12,18,21H,2,13-17H2,1H3,(H,34,38);2*2-5H,1H3,(H,8,9,10)

SMILES Code: O=C(C1=C(CC)N=C2C=CC(Cl)=CN21)NCC3=CC=C(N4CCC(C5=CC=C(OC(F)(F)F)C=C5)CC4)C=C3.O=S(C6=CC=C(C)C=C6)(O)=O.O=S(C7=CC=C(C)C=C7)(O)=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:

Additional Information

Related CAS#

1334719-95-7 (Q-203)
1566517-83-6 (Q-203 ditosylate)


1: Kang S, Kim YM, Kim RY, Seo MJ, No Z, Nam K, Kim S, Kim J. Synthesis and structure-activity studies of side chain analogues of the anti-tubercular agent, Q203. Eur J Med Chem. 2017 Jan 5;125:807-815. doi: 10.1016/j.ejmech.2016.09.082. PubMed PMID: 27750198.

2: Pethe K, Bifani P, Jang J, Kang S, Park S, Ahn S, Jiricek J, Jung J, Jeon HK, Cechetto J, Christophe T, Lee H, Kempf M, Jackson M, Lenaerts AJ, Pham H, Jones V, Seo MJ, Kim YM, Seo M, Seo JJ, Park D, Ko Y, Choi I, Kim R, Kim SY, Lim S, Yim SA, Nam J, Kang H, Kwon H, Oh CT, Cho Y, Jang Y, Kim J, Chua A, Tan BH, Nanjundappa MB, Rao SP, Barnes WS, Wintjens R, Walker JR, Alonso S, Lee S, Kim J, Oh S, Oh T, Nehrbass U, Han SJ, No Z, Lee J, Brodin P, Cho SN, Nam K, Kim J. Discovery of Q203, a potent clinical candidate for the treatment of tuberculosis. Nat Med. 2013 Sep;19(9):1157-60. doi: 10.1038/nm.3262. PubMed PMID: 23913123.

3: Kang S, Kim RY, Seo MJ, Lee S, Kim YM, Seo M, Seo JJ, Ko Y, Choi I, Jang J, Nam J, Park S, Kang H, Kim HJ, Kim J, Ahn S, Pethe K, Nam K, No Z, Kim J. Lead optimization of a novel series of imidazo[1,2-a]pyridine amides leading to a clinical candidate (Q203) as a multi- and extensively-drug-resistant anti-tuberculosis agent. J Med Chem. 2014 Jun 26;57(12):5293-305. doi: 10.1021/jm5003606. PubMed PMID: 24870926.

4: Hoagland DT, Liu J, Lee RB, Lee RE. New agents for the treatment of drug-resistant Mycobacterium tuberculosis. Adv Drug Deliv Rev. 2016 Jul 1;102:55-72. doi: 10.1016/j.addr.2016.04.026. Review. PubMed PMID: 27151308; PubMed Central PMCID: PMC4903924.

5: Kim MS, Jang J, Ab Rahman NB, Pethe K, Berry EA, Huang LS. Isolation and Characterization of a Hybrid Respiratory Supercomplex Consisting of Mycobacterium tuberculosis Cytochrome bcc and Mycobacterium smegmatis Cytochrome aa3. J Biol Chem. 2015 Jun 5;290(23):14350-60. doi: 10.1074/jbc.M114.624312. PubMed PMID: 25861988; PubMed Central PMCID: PMC4505504.

6: Lamprecht DA, Finin PM, Rahman MA, Cumming BM, Russell SL, Jonnala SR, Adamson JH, Steyn AJ. Turning the respiratory flexibility of Mycobacterium tuberculosis against itself. Nat Commun. 2016 Aug 10;7:12393. doi: 10.1038/ncomms12393. PubMed PMID: 27506290; PubMed Central PMCID: PMC4987515.