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ALX-430-095 Revised 23-Jan-08
Leflunomide
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SYNONYMS HWA486
5-Methylisoxazole-4-(4-trifluoromethylcarboxanilide)
N-(4-Trifluoromethylphenyl)-5-methylisoxazol-4-carboxamide
PRODUCT LINE Immunology
PRODUCT CATEGORY Immunomodulators Other Products
Ordering Information
Product Numbers: Format: Size: Unit Price: Quantity: Add To Cart
ALX-430-095-M010   10 mg 15.00 USD Add To Cart
ALX-430-095-M050   50 mg 40.00 USD Add To Cart
ALX-430-095-G001   1 g 380.00 USD Add To Cart
Product Specification
FORMULA: C12H9F3N2O2
MW: 270.2
CAS NUMBER: 75706-12-6
MERCK INDEX: 14: 5432
RTECS: NY2354200
PURITY: ≥99% (HPLC)
APPEARANCE: White to off-white solid.
SOLUBILITY: Soluble in DMSO or methanol.
SHIPPING: AMBIENT
LONG TERM STORAGE: +4°C
HANDLING: Keep under inert gas. Protect from light.
HAZARD: HARMFUL.

Product Description
Immunosuppressive drug that inhibits T and B cell responses in vivo. Inhibitor of tyrosine phosphorylation (tyrosine kinase inhibitor), of dihydroorotate dehydrogenase, an enzyme for de novo pyrimidine synthesis, of TNF-dependent NF-κB activation, and of COX-2. The physiological activity of leflunomide is attributed mainly to its metabolite A77 1726 (Prod. No. ALX-430-096).
Product Specific Literature References
Immunopharmacological profile of a novel isoxazol derivative, HWA 486, with potential antirheumatic activity-I. Disease modifying action on adjuvant arthritis of the rat: R.R. Bartlett & R. Schleyerbach; Int. J. Immunopharmacol. 7, 7 (1985) Abstract
Leflunomide (HWA 486), a novel immunomodulating compound for the treatment of autoimmune disorders and reactions leading to transplantation rejection: R.R. Bartlett, et al.; Agents Actions 32, 10 (1991) Abstract
Inhibition of the epidermal growth factor receptor tyrosine kinase activity by leflunomide: T. Mattar, et al.; FEBS Lett. 334, 161 (1993) Abstract
Inhibition of protein tyrosine phosphorylation in T cells by a novel immunosuppressive agent, leflunomide: X. Xu, et al.; J. Biol. Chem. 270, 12398 (1995) Abstract; Full Text
Molecular mechanisms of action of new xenobiotic immunosuppressive drugs: tacrolimus (FK506), sirolimus (rapamycin), mycophenolate mofetil and leflunomide: T.R. Brazelton & R.E. Morris; Curr. Opin. Immunol. 8, 710 (1996) Abstract
The immunosuppressive metabolite of leflunomide is a potent inhibitor of human dihydroorotate dehydrogenase: J.P. Davis, et al.; Biochemistry 35, 1270 (1996) Abstract
Regulation of B cell function by the immunosuppressive agent leflunomide: K.F. Siemasko, et al.; Transplantation 61, 635 (1996) Abstract
Two activities of the immunosuppressive metabolite of leflunomide, A77 1726. Inhibition of pyrimidine nucleotide synthesis and protein tyrosine phosphorylation: X. Xu, et al.; Biochem. Pharmacol. 52, 527 (1996) Abstract
Potencies of leflunomide and HR325 as inhibitors of prostaglandin endoperoxide H synthase-1 and -2: comparison with nonsteroidal anti- inflammatory drugs: A.P. Curnock, et al.; J. Pharmacol. Exp. Ther. 282, 339 (1997) Abstract
In vivo mechanism by which leflunomide controls lymphoproliferative and autoimmune disease in MRL/MpJ-lpr/lpr mice: X. Xu, et al.; J. Immunol. 159, 167 (1997) Abstract
Leflunomide, a novel immunomodulating agent, prevents the development of allergic sensitization in an animal model of allergic asthma: E. Eber, et al.; Clin. Exp. Allergy 28, 376 (1998) Abstract
Species-related inhibition of human and rat dihydroorotate dehydrogenase by immunosuppressive isoxazol and cinchoninic acid derivatives: W. Knecht & M. Löffler; Biochem. Pharmacol. 56, 1259 (1998) Abstract
Inhibition of JAK3 and STAT6 tyrosine phosphorylation by the immunosuppressive drug leflunomide leads to a block in IgG1 production: K.F. Siemasko, et al.; J. Immunol. 160, 1581 (1998) Abstract
In vivo activity of leflunomide: pharmacokinetic analyses and mechanism of immunosuppression: A.S. Chong, et al.; Transplantation 68, 100 (1999) Abstract
Immunosuppressive leflunomide metabolite (A77 1726) blocks TNF- dependent nuclear factor-kappa B activation and gene expression: S.K. Manna and B.B. Aggarwal; J. Immunol. 162, 2095 (1999) Abstract
A771726, the active metabolite of leflunomide, directly inhibits the activity of cyclo-oxygenase-2 in vitro and in vivo in a substrate- sensitive manner: L.C. Hamilton, et al.; Br. J. Pharmacol. 127, 1589 (1999) Abstract
Leflunomide: mode of action in the treatment of rheumatoid arthritis: F.C. Breedveld & J.M. Dayer; Ann. Rheum. Dis. 59, 841 (2000) Abstract
General Literature References
Leflunomide, a novel immunomodulator for the treatment of active rheumatoid arthritis: M.M. Goldenberg; Clin. Ther. 21, 1837 (1999), (Review) Abstract
Leflunomide, mycophenolic acid and matrix metalloproteinase inhibitors: D.E. Furst; Rheumatology (Oxford) 38 Suppl 2, 14 (1999), (Review) Abstract
Leflunomide and methotrexate: R.F. Laan, et al.; Curr. Opin. Rheumatol. 13, 159 (2001), (Review) Abstract
Experiences with leflunomide in solid organ transplantation: J.W. Williams, et al.; Transplantation 73, 358 (2002), (Review) Abstract
Further Categories Containing This Product:
NF-kB Pathway InhibitorsTyrosine Kinase InhibitorsCOX Inhibitors
 
 
ALX-380-101 Revised 12-Oct-07
Leptomycin A
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SYNONYMS ATS1287 A
LMA
PRODUCT LINE Natural Products / Antibiotics
PRODUCT CATEGORY Antibiotics - Antifungal
Ordering Information
Product Numbers: Format: Size: Unit Price: Quantity: Add To Cart
ALX-380-101-C050   50 µg 75.00 USD Add To Cart
ALX-380-101-C100   100 µg 120.00 USD Add To Cart
Product Specification
FORMULA: C32H46O6
MW: 526.7
CAS NUMBER: 87081-36-5
SOURCE/HOST: Isolated from Streptomyces sp.
CONCENTRATION: 0.1mg/ml
PURITY: ≥95% (HPLC)
APPEARANCE: Liquid. In 100% ethanol.
SOLUBILITY: Soluble in methanol or 100% ethanol.
SHIPPING: SHIPPED ON BLUE ICE
LONG TERM STORAGE: -20°C
HANDLING: Protect from light. Packaged under inert gas.
HAZARD: FLAMMABLE. TOXIC.

Product Description
Antifungal antibiotic that acts as an inhibitor of nuclear export by interacting with CRM1/exportin-1. Inhibits nucleo-cytoplasmic translocation of molecules such as the HIV-1 Rev protein and Rev-dependent export of mRNA.
Product Specific Literature References
Leptomycins A and B, new antifungal antibiotics. I. Taxonomy of the producing strain and their fermentation, purification and characterization: T. Hamamoto, et al.; J Antibiot (Tokyo) 36, 639 (1983) Abstract
General Information
BACKGROUND/TECHNICAL INFORMATION Please also see our Product Flyer "LEPTOMYCIN A+B, Inhibitors of Nuclear-Cytoplasmic Transport".
Further Categories Containing This Product:
Antibiotics for Cell Cycle ResearchNuclear Envelope & Nuclear Transport
 
 
ALX-380-100 Revised 14-Mar-08
Leptomycin B
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SYNONYMS LMB
PRODUCT LINE Natural Products / Antibiotics
PRODUCT CATEGORY Antibiotics - Antifungal
Ordering Information
Product Numbers: Format: Size: Unit Price: Quantity: Add To Cart
ALX-380-100-C100   100 µg 95.00 USD Add To Cart
Product Specification
FORMULA: C33H48O6
MW: 540.7
CAS NUMBER: 87081-35-4
SOURCE/HOST: Isolated from Streptomyces sp.
CONCENTRATION: 0.2mg/ml
PURITY: ≥98% (HPLC)
FORMULATION: Liquid. In 100% ethanol.
SOLUBILITY: Soluble in methanol or 100% ethanol; insoluble in water.
SHIPPING: SHIPPED ON BLUE ICE
LONG TERM STORAGE: -20°C
HANDLING: Protect from light. Packaged under inert gas.
HAZARD: TOXIC. FLAMMABLE.

Product Description
Antifungal antibiotic that acts as an inhibitor of nuclear export by interacting with CRM1/exportin-1. Inhibits nucleo-cytoplasmic translocation of molecules such as the HIV-1 Rev protein and Rev-dependent export of mRNA. Other proteins that are influenced by leptomycin B are actin, c-Abl, cyclin B1, MDM2/p53, Iκb, MPF and PKA.
Product Specific Literature References
Leptomycins A and B, new antifungal antibiotics. I. Taxonomy of the producing strain and their fermentation, purification and characterization: T. Hamamoto, et al.; J. Antibiot. (Tokyo) 36, 639 (1983) Abstract
Ratjadone and leptomycin B block CRM1-dependent nuclear export by identical mechanisms: T. Meissner, et al.; FEBS Lett. 576, 27 (2004) Abstract
General Information
BACKGROUND/TECHNICAL INFORMATION Please also see our Product Flyer "LEPTOMYCIN A+B, Inhibitors of Nuclear-Cytoplasmic Transport".
 
 
ALX-850-313 Revised 14-Feb-07
Leptomycin Set I
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PRODUCT LINE Natural Products / Antibiotics
PRODUCT CATEGORY Antibiotics - Antifungal
Ordering Information
Product Numbers: Format: Size: Unit Price: Quantity: Add To Cart
ALX-850-313-KI01   1 Set 170.00 USD Add To Cart
Product Specification
KIT/SET CONTAINS: 1x100µg of Leptomycin A (Prod. No. ALX-380-101)
1x100µg of Leptomycin B (Prod. No. ALX-380-100)
PURITY: ≥95% (HPLC)
SHIPPING: SHIPPED ON BLUE ICE
LONG TERM STORAGE: -20°C
HANDLING: Protect from light.
General Information
BACKGROUND/TECHNICAL INFORMATION Please also see our Product Flyer "LEPTOMYCIN A+B, Inhibitors of Nuclear-Cytoplasmic Transport".
 
 
ALX-850-316 Revised 01-Nov-07
Leptomycin Set II
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PRODUCT LINE Natural Products / Antibiotics
PRODUCT CATEGORY Antibiotics - Antifungal
Ordering Information
Product Numbers: Format: Size: Unit Price: Quantity: Add To Cart
ALX-850-316-KI01   1 Set 290.00 USD Add To Cart
Product Specification
KIT/SET CONTAINS: 1x100µg of Leptomycin A (Prod. No. ALX-380-101)
1x100µg of Leptomycin B (Prod. No. ALX-380-100)
1x5µg of Ratjadone C (native) (Prod. No. ALX-270-369)
PURITY: ≥95% (HPLC)
SHIPPING: SHIPPED ON BLUE ICE
LONG TERM STORAGE: -20°C
HANDLING: Protect from light.
General Information
BACKGROUND/TECHNICAL INFORMATION Please also see our Product Flyer "LEPTOMYCIN A+B, Inhibitors of Nuclear-Cytoplasmic Transport".
 
 
ALX-340-038 Revised 08-Sep-08
Leukotriene B4
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SYNONYMS LTB4
5,12-Dihydroxy-[S-[R*,S*-(E,Z,Z,E)]]-6,8,10,14-eicosatetraenoic acid
PRODUCT LINE Inflammation
PRODUCT CATEGORY Leukotrienes
Ordering Information
Product Numbers: Format: Size: Unit Price: Quantity: Add To Cart
ALX-340-038-C025   25 µg 170.00 USD Add To Cart
Product Specification
FORMULA: C20H32O4
MW: 336.5
CAS NUMBER: 71160-24-2
MERCK INDEX: 14: 5455
CONCENTRATION: 0.1mg/ml
PURITY: ≥97%
FORMULATION: Liquid. Solution in ethanol.
SOLUBILITY: Soluble in DMSO or dimethyl formamide; slightly soluble in PBS, pH 7.2 (1mg/ml). Solvents should be free of oxygen, transition metal ions, and redox active compounds.
SHIPPING: SHIPPED ON BLUE ICE
LONG TERM STORAGE: -20°C
USE/STABILITY: Stable for at least 1 year after receipt when stored at -20°C. We do not recommend storing aqueous solutions for more than one day.
HANDLING: Protect from light and oxygen.

Product Description
Activator of PPARα. Stimulates a number of leukocyte functions, including aggregation, stimulation of ion fluxes, enhancement of lysosomal enzyme release, superoxide anion production, chemotaxis, and chemokinesis.
Product Specific Literature References
Leukotriene B4 and inflammatory disease: R.M. McMillan & S.J. Foster; Agents Actions 24, 114 (1988) Abstract
The PPARalpha-leukotriene B4 pathway to inflammation control: P.R. Devchand, et al.; Nature 384, 39 (1996) Abstract
Leukotriene B4: S.W. Crooks & R.A. Stockley; Int. J. Biochem. Cell Biol. 30, 173 (1998), (Review) Abstract
The peroxisome proliferator-activated receptor alpha (PPARalpha) ligand WY 14,643 does not interfere with leukotriene B4 induced adhesion of neutrophils to endothelial cells: M. Heimbürger & J. Palmblad; BBRC 249, 371 (1998) Abstract
Ligand selectivity of the peroxisome proliferator-activated receptor alpha: Q. Lin, et al.; Biochemistry 38, 185 (1999) Abstract
General Information
BACKGROUND/TECHNICAL INFORMATION To change the solvent, evaporate the ethanol under a gentle stream of nitrogen and immediately add the solvent of choice.
Further Categories Containing This Product:
PPAR Agonists
 
 
ALX-380-292 Revised 15-Apr-08
Levofloxacin . hydrochloride
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SYNONYMS (S)-(-)-9-fluoro-2,3-dihydro-3-methyl-10- (4-methyl-1-piperazinyl)-7-oxo-7H-pyrido [1,2,3-de]-1,4-benzoxazine-6-carboxylic acid . hydrochloride
S-(-)-Ofloxacin . hydrochloride
Ordering Information
Product Numbers: Format: Size: Unit Price: Quantity: Add To Cart
ALX-380-292-G001   1 g 30.00 USD Add To Cart
ALX-380-292-G005   5 g 70.00 USD Add To Cart
Product Specification
FORMULA: C18H20FN3O4 . HCl
MW: 361.4 . 36.5
CAS NUMBER: 177325-13-2
MERCK INDEX: 14: 6771
RTECS: UU8815550
PURITY: ≥89.5% (Assay)
APPEARANCE: Slightly yellow crystalline powder.
SOLUBILITY: Soluble in water (25mg/ml).
SHIPPING: AMBIENT
LONG TERM STORAGE: -20°C
HAZARD: HARMFUL.

Product Description

Fluoroquinolone with broad spectrum activity against Gram-negative and Gram-positive bacteria. Active enantiomer of ofloxacin with twice its potency. Inhibits bacterial DNA-gyrase (topoisomerase).

Product Specific Literature References
Levofloxacin. A review of its antibacterial activity, pharmacokinetics and therapeutic efficacy: R. Davis & H.M: Bryson; Drugs 47, 677 (1994) Abstract
The clinical pharmacokinetics of levofloxacin: D.N. Fish & A.T. Chow; Clin. Pharmacokinet. 32, 101 (1997) Abstract
Levofloxacin: an updated review of its use in the treatment of bacterial infections: M. Hurst, et al.; Drugs 62, 2127 (2002) Abstract
Levofloxacin : a review of its use as a high-dose, short-course treatment for bacterial infection: V.R. Anderson & C.M. Perry; Drugs 68, 535 (2008) Abstract
Related Products
 
 
ALX-380-293 Revised 04-Aug-08
Lomefloxacin . hydrochloride
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SYNONYMS 1-Ethyl-6,8-difluoro-1,4-dihydro-7-(3-methyl-1-piperazinyl)-4-oxo-3-quinolinecarboxylic acid
Ordering Information
Product Numbers: Format: Size: Unit Price: Quantity: Add To Cart
ALX-380-293-G001   1 g 20.00 USD Add To Cart
ALX-380-293-G005   5 g 80.00 USD Add To Cart
Product Specification
FORMULA: C17H19F2N3O3 . HCl
MW: 351.4 . 36.5
CAS NUMBER: 98079-52-8
MERCK INDEX: 14: 5562
RTECS: VB1997500
PURITY: ≥89% (Assay)
APPEARANCE: White to off-white crystalline powder.
SOLUBILITY: Soluble in 1M sodium hydroxide (50mg/ml); sparingly soluble in water; insoluble in 100% ethanol.
SHIPPING: AMBIENT
LONG TERM STORAGE: -20°C
HANDLING: Protect from light.
HAZARD: HARMFUL.

Product Description

Fluoroquinolone with broad spectrum activity against Gram-negative and Gram-positive bacteria. Inhibits bacterial DNA-gyrase (topoisomerase).

Product Specific Literature References
Mechanism of action of lomefloxacin: L.J. Piddock, et al.; Antimicrob. Agents Chemother. 34, 1088 (1990) Abstract; Full Text
Antibacterial activity of lomefloxacin in a pharmacokinetic in vitro model: C. Rustige & B. Wiedemann; Antimicrob. Agents Chemother. 34, 1107 (1990) Abstract; Full Text
 
 
ALX-400-038 Revised 18-Feb-08
Lomustine
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SYNONYMS CCNU
N-(2-Chloroethyl)-N'-cyclohexyl-N-nitrosourea
PRODUCT LINE Cancer
PRODUCT CATEGORY Antitumor Agents (DNA Interaction & Gene Regulation)
Ordering Information
Product Numbers: Format: Size: Unit Price: Quantity: Add To Cart
ALX-400-038-M050   50 mg 60.00 USD Add To Cart
Product Specification
FORMULA: C9H16CIN3O2
MW: 233.7
CAS NUMBER: 13010-47-4
MERCK INDEX: 14: 5564
PURITY: ≥97% (Assay)
APPEARANCE: Yellowish crystalline solid.
SOLUBILITY: Soluble in 100% ethanol or acetone.
SHIPPING: AMBIENT
LONG TERM STORAGE: +4°C
HANDLING: Protect from moisture.
HAZARD: MAY BE CARCINOGENIC. IRRITANT.

Product Description
Possesses antitumor activity similar to carmustine (Prod. No. ALX-400-037).
Related Products
Further Categories Containing This Product:
DNA Repair Other Products
 
 
ALX-340-026 Revised 16-Jun-06
LY-171,883