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439863-90-8

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439863-90-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 439863-90-8 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 4,3,9,8,6 and 3 respectively; the second part has 2 digits, 9 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 439863-90:
(8*4)+(7*3)+(6*9)+(5*8)+(4*6)+(3*3)+(2*9)+(1*0)=198
198 % 10 = 8
So 439863-90-8 is a valid CAS Registry Number.

439863-90-8Upstream product

439863-90-8Relevant articles and documents

Synthesis of heterocyclic systems by the reaction of zwitterionic compounds with isocyanates and thiophosgene

Zaleska, Barbara,Karelus, Marcin

, p. 1831 - 1834 (2007/10/03)

The reaction of various isocyanates or thiophosgene with zwitterionic pyrimidinylium and 1,3-diazepinylium derivatives has led to the formation of unusually substituted [1,3]oxazolo[3,4-a]pyrimidines and novel heterocyclic system such as [1,3]oxazolo[3,4-

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