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720684-44-6

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720684-44-6 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 720684-44-6 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 7,2,0,6,8 and 4 respectively; the second part has 2 digits, 4 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 720684-44:
(8*7)+(7*2)+(6*0)+(5*6)+(4*8)+(3*4)+(2*4)+(1*4)=156
156 % 10 = 6
So 720684-44-6 is a valid CAS Registry Number.

720684-44-6Downstream Products

720684-44-6Relevant articles and documents

Synthesis of 2-oxo-[1,2,4]triazolo[3,2-d] [1,5]benzoxazepines: A kind of novel tricyclic O,N-heterocycles

Li, Zheng,Wang, Quanrui,Tao, Fenggang

, p. 1691 - 1702 (2007/10/03)

The synthesis of a series of novel tricyclic O,N-heterocycles 7a-k, a kind of unprecedented 2-oxo-[1,2,4]triazolo[3,2-d][1,5]benzoxazepine derivatives, has been accomplished, featuring acid-induced ring closure of the geminal arylazo isocyanato compounds 5, which were prepared from chroman-4-ones in three steps, followed by feasible ring expansion and basic work-up.

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