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1256752-41-6

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1256752-41-6 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1256752-41-6 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,2,5,6,7,5 and 2 respectively; the second part has 2 digits, 4 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 1256752-41:
(9*1)+(8*2)+(7*5)+(6*6)+(5*7)+(4*5)+(3*2)+(2*4)+(1*1)=166
166 % 10 = 6
So 1256752-41-6 is a valid CAS Registry Number.

1256752-41-6Relevant articles and documents

Synthesis and biological activities of new furo[3,4-b]carbazoles: Potential topoisomerase II inhibitors

Hajbi, Youssef,Neagoie, Cléopatra,Biannic, Bérenger,Chilloux, Aurélie,Vedrenne, Emeline,Baldeyrou, Brigitte,Bailly, Christian,Mérour, Jean-Yves,Rosca, Sorin,Routier, Sylvain,Lansiaux, Amélie

experimental part, p. 5428 - 5437 (2010/12/25)

New 1,5-Dihydro-4-(substituted phenyl)-3H-furo[3,4-b]carbazol-3-ones were synthesised via a key step Diels-Alder reaction under microwave irradiation. 3-Formylindole was successfully used in a 6-step synthesis to obtain those complex heterocycles. The Diels-Alder reaction generating the carbazole ring was optimised under thermal conditions or microwave irradiation. After cleavage of functional groups, DNA binding, topoisomerase inhibition and cytotoxic properties of the new-formed furocarbazoles were investigated. These carbazoles do not present a strong interaction with the DNA, and do not modify the relaxation of the DNA in the presence of topoisomerase I or II except for one promising compound. This compound is a potent topoisomerase II inhibitor, and its cellular activity is not moderated compared to etoposide. The synthesis of these molecules allowed the generalisation of the method using indole and 5-OBn indole and several benzaldehydes. The synthesis of these molecules produced chemical structures endowed with promising cytotoxic and topoisomerase II inhibition activities.

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