184475-55-6 Usage
Biological Activity
the egfr is a mr 170,000 transmembrane glycoprotein with an external binding domain and an intracellular tyrosine kinase domain. gefitinib (zd-1839, iressa) is an epidermal growth factor receptor-selective tyrosine kinase inhibitor.
in vitro
gefitinib inhibited colony formation in soft agar in a dose dependent manner in all cancer cell lines. however, treatment with higher doses resulted in a 2–4-fold increases in apoptosis. dose-dependent supra-additive increase in growth inhibition was observed when cancer cells were treated with totoxic drugs and gefitinib. the combined treatment markedly enhanced apoptotic cell death induced by single agent treatment [1].
in vivo
gefitinib treatment of nude mice bearing established human geo colon cancer xenografts revealed a reversible dose-dependent inhibition of tumor growth because geo tumors resumed the growth rate of controls at the end of the treatment [1].
references
[1] ciardiello f, caputo r, bianco r, damiano v, pomatico g, de placido s, bianco ar, tortora g. antitumor effect and potentiation of cytotoxic drugs activity in human cancer cells by zd-1839 (iressa), an epidermal growth factor receptor-selective tyrosine kinase inhibitor. clin cancer res. 2000;6(5):2053-63.[2] cantarini mv, mcfarquhar t, smith rp, bailey c, marshall al. relative bioavailability and safety profile of gefitinib administered as a tablet or as a dispersion preparation via drink or nasogastric tube: results of a randomized, open-label, three-period crossover study in healthy volunteers. clin ther. 2004;26(10):1630-6.
Check Digit Verification of cas no
The CAS Registry Mumber 184475-55-6 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,8,4,4,7 and 5 respectively; the second part has 2 digits, 5 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 184475-55:
(8*1)+(7*8)+(6*4)+(5*4)+(4*7)+(3*5)+(2*5)+(1*5)=166
166 % 10 = 6
So 184475-55-6 is a valid CAS Registry Number.
InChI:InChI=1/C22H24ClFN4O3.ClH/c1-29-20-13-19-16(12-21(20)31-8-2-5-28-6-9-30-10-7-28)22(26-14-25-19)27-15-3-4-18(24)17(23)11-15;/h3-4,11-14H,2,5-10H2,1H3,(H,25,26,27);1H
184475-55-6Relevant articles and documents
Quinazoline derivatives
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, (2008/06/13)
The invention concerns quinazoline derivatives of the formula I STR1 wherein n is 1, 2 or 3 and each R2 is independently halogeno, trifluoromethyl or (1-4C)alkyl; R3 is (1-4C)alkoxy; and R1 is di-?(1-4C)alkyl!amino-(2-4C)alkoxy, pyrrolidin-1-yl-(2-4C)alkoxy, piperidino-(2-4C)alkoxy, morpholino-(2-4C)alkoxy, piperazin-1-yl-(2-4C)alkoxy, 4-(1-4C)alkylpiperazin-1-yl-(2-4C)alkoxy, imidazol-1-yl-(2-4C)alkoxy, di-?(1-4C)alkoxy-(2-4C)alkyl!amino-(2-4C)alkoxy, thiamorpholino-(2-4C)alkoxy, 1-oxothiamorpholino-(2-4C)alkoxy or 1,1-dioxothiamorpholino-(2-4C)alkoxy, and wherein any of the above-mentioned R1 substituents comprising a CH2 (methylene) group which is not attached to a N or O atom optionally bears on said CH2 group a hydroxy substituent; or pharmaceutically-acceptable salts thereof; processes for their preparation, pharmaceutical compositions containing them, and the use of the receptor tyrosine kinase inhibitory properties of the compounds in the treatment of proliferative disease such as cancer.
