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887250-18-2

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887250-18-2 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 887250-18-2 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 8,8,7,2,5 and 0 respectively; the second part has 2 digits, 1 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 887250-18:
(8*8)+(7*8)+(6*7)+(5*2)+(4*5)+(3*0)+(2*1)+(1*8)=202
202 % 10 = 2
So 887250-18-2 is a valid CAS Registry Number.

887250-18-2Relevant articles and documents

Five-membered 2,3-dioxo heterocycles: L. Synthesis and thermolysis of 3-aroyl- and 3-hetaroyl-5-phenyl-1,2,4,5-tetrahydropyrrolo[1,2-a]quinoxalin-1,2, 4-triones

Bozdyreva,Smirnova,Maslivets

, p. 1081 - 1088 (2005)

(Z)-3-Phenacylidene- and (Z)-3-hetaroylmethylidene-1-phenyl-1,2,3,4- tetrahydroquinoxalin-2-ones react with oxalyl chloride to give 3-acyl-5-phenyl-1,2,4,5-tetrahydropyrrolo[1,2-a]quinoxaline-1,2,4-triones. Thermolysis of the latter generates acyl(3-oxo-4

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