L-778123 HCl

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

MedKoo CAT#: 206097

CAS#: 253863-00-2 (HCl)

Description: L-778123 is an inhibitor of FPTase and GGPTase-I, which was developed in part because it can completely inhibit Ki-Ras prenylation. The combination of L-778,123 and radiotherapy at dose level 1 showed acceptable toxicity in patients with locally advanced pancreatic cancer. Radiosensitization of a patient-derived pancreatic cancer cell line was observed.

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L-778123 HCl, purity > 98%, is in stock. The same day shipping out after order is received. Note: the estimated shipping out time for order > 500mg may be 6 weeks.

Chemical Structure


Theoretical Analysis

MedKoo Cat#: 206097
Name: L-778123 HCl
CAS#: 253863-00-2 (HCl)
Chemical Formula: C22H20ClN5O
Exact Mass:
Molecular Weight: 405.88
Elemental Analysis: C, 65.10; H, 4.97; Cl, 8.73; N, 17.25; O, 3.94

Related CAS #: 253863-00-2 (HCl)   183499-57-2 (free base)   183499-56-1 (2HCl)  

Synonym: L778123; L-778123; L 778123; L778,123; L-778,123; L 778,123 HCl; L-778123 hydrochloride

IUPAC/Chemical Name: 4-((5-((4-(3-chlorophenyl)-3-oxopiperazin-1-yl)methyl)-1H-imidazol-1-yl)methyl)benzonitrile hydrochloride


InChi Code: InChI=1S/C22H20ClN5O.ClH/c23-19-2-1-3-20(10-19)28-9-8-26(15-22(28)29)14-21-12-25-16-27(21)13-18-6-4-17(11-24)5-7-18;/h1-7,10,12,16H,8-9,13-15H2;1H

SMILES Code: N#CC1=CC=C(CN2C(CN3CC(N(C4=CC=CC(Cl)=C4)CC3)=O)=CN=C2)C=C1.[H]Cl

Technical Data

white solid powder

>98% (or refer to the Certificate of Analysis)

Certificate of Analysis:

Safety Data Sheet (MSDS):

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, not in water

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



1: Si MS, Reitz BA, Borie DC. Inhibition of lymphocyte activation and function by the prenylation inhibitor L-778,123. Invest New Drugs. 2005 Jan;23(1):21-9. PubMed PMID: 15528977.

2: Martin NE, Brunner TB, Kiel KD, DeLaney TF, Regine WF, Mohiuddin M, Rosato EF, Haller DG, Stevenson JP, Smith D, Pramanik B, Tepper J, Tanaka WK, Morrison B, Deutsch P, Gupta AK, Muschel RJ, McKenna WG, Bernhard EJ, Hahn SM. A phase I trial of the dual farnesyltransferase and geranylgeranyltransferase inhibitor L-778,123 and radiotherapy for locally advanced pancreatic cancer. Clin Cancer Res. 2004 Aug 15;10(16):5447-54. PubMed PMID: 15328183.

3: Reid TS, Long SB, Beese LS. Crystallographic analysis reveals that anticancer clinical candidate L-778,123 inhibits protein farnesyltransferase and geranylgeranyltransferase-I by different binding modes. Biochemistry. 2004 Jul 20;43(28):9000-8. PubMed PMID: 15248757.

4: Huang XK, Meyer P, Li B, Raza A, Preisler HD. The effects of the farnesyl transferase inhibitor FTI L-778,123 on normal, myelodysplastic, and myeloid leukemia bone marrow progenitor proliferation in vitro. Leuk Lymphoma. 2003 Jan;44(1):157-64. PubMed PMID: 12691158.

5: Lobell RB, Liu D, Buser CA, Davide JP, DePuy E, Hamilton K, Koblan KS, Lee Y, Mosser S, Motzel SL, Abbruzzese JL, Fuchs CS, Rowinsky EK, Rubin EH, Sharma S, Deutsch PJ, Mazina KE, Morrison BW, Wildonger L, Yao SL, Kohl NE. Preclinical and clinical pharmacodynamic assessment of L-778,123, a dual inhibitor of farnesyl:protein transferase and geranylgeranyl:protein transferase type-I. Mol Cancer Ther. 2002 Jul;1(9):747-58. PubMed PMID: 12479371.

6: Hahn SM, Bernhard EJ, Regine W, Mohiuddin M, Haller DG, Stevenson JP, Smith D, Pramanik B, Tepper J, DeLaney TF, Kiel KD, Morrison B, Deutsch P, Muschel RJ, McKenna WG. A Phase I trial of the farnesyltransferase inhibitor L-778,123 and radiotherapy for locally advanced lung and head and neck cancer. Clin Cancer Res. 2002 May;8(5):1065-72. PubMed PMID: 12006520.

7: Britten CD, Rowinsky EK, Soignet S, Patnaik A, Yao SL, Deutsch P, Lee Y, Lobell RB, Mazina KE, McCreery H, Pezzuli S, Spriggs D. A phase I and pharmacological study of the farnesyl protein transferase inhibitor L-778,123 in patients with solid malignancies. Clin Cancer Res. 2001 Dec;7(12):3894-903. PubMed PMID: 11751480.

8: Buser CA, Dinsmore CJ, Fernandes C, Greenberg I, Hamilton K, Mosser SD, Walsh ES, Williams TM, Koblan KS. High-performance liquid chromatography/mass spectrometry characterization of Ki4B-Ras in PSN-1 cells treated with the prenyltransferase inhibitor L-778,123. Anal Biochem. 2001 Mar 1;290(1):126-37. PubMed PMID: 11180946.