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126541-80-8

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126541-80-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 126541-80-8 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,2,6,5,4 and 1 respectively; the second part has 2 digits, 8 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 126541-80:
(8*1)+(7*2)+(6*6)+(5*5)+(4*4)+(3*1)+(2*8)+(1*0)=118
118 % 10 = 8
So 126541-80-8 is a valid CAS Registry Number.

126541-80-8Relevant articles and documents

Demethyl(trifluoromethyl)actinomycins

Giencke, Astrid,Lackner, Helmut

, p. 569 - 579 (2007/10/02)

The synthesis of new 4-(trifluoromethyl)benzoic acid derivatives 2-10 and their coupling with amino acids and peptides 12, 13, 15 is described.They serve as precursors for the synthesis of the hitherto unknown demethyl(trifluoromethyl)actinocin dimethyl esters 11, demethyl-trifluoromethyl-actinocinyl peptides 14, 16, 18 and the demethyl-trifluoromethyl-actinomycins 17.Although spacially comparable with the methyl residues, the 4- and 6-trifluoromethyl groups have unexpected strong influences on the antibiotic and cytostatic properties of the actinomycins.The CH3/CF3 exchange makes it possible to bring NMR-analytically useful hetero nuclei into the centre of the actinomycin/DNA complex (Figure 1).

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