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128156-33-2

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128156-33-2 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 128156-33-2 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,2,8,1,5 and 6 respectively; the second part has 2 digits, 3 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 128156-33:
(8*1)+(7*2)+(6*8)+(5*1)+(4*5)+(3*6)+(2*3)+(1*3)=122
122 % 10 = 2
So 128156-33-2 is a valid CAS Registry Number.

128156-33-2Relevant articles and documents

Selective reduction exocyclic double bond of isoxazolones and pyrazolones by hantzsch 1,4-dihydropyridine

Liu, Zhengang,Han, Bing,Liu, Qiang,Zhang, Wei,Yang, Li,Liu, Zhong-Li,Yu, Wei

, p. 1579 - 1580 (2007/10/03)

Hantzsch 1,4-dihydropyridine (HEH) was used to realize the selective reduction of the exocyclic double bond of 4-arylmethylene- and 4-alkylidene-4H-isoxazol-5-ones and 4-arylraethylene-4H-pyrazol-5-ones. Georg Thieme Verlag Stuttgart.

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