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19994-59-3

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19994-59-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 19994-59-3 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 1,9,9,9 and 4 respectively; the second part has 2 digits, 5 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 19994-59:
(7*1)+(6*9)+(5*9)+(4*9)+(3*4)+(2*5)+(1*9)=173
173 % 10 = 3
So 19994-59-3 is a valid CAS Registry Number.

19994-59-3Relevant articles and documents

The Oxidation of 6- and 7-Aryl-4(3H)-pteridinones by Immobilized Arthrobacter M-4 Cells Containing Xanthine Oxidase

Meester, Johan W. G. De,Plas, Henk C. van der,Middelhoven, Wouter J.

, p. 441 - 451 (2007/10/02)

The preparation of 6- and 7-(pX-phenyl)-4(3H)-pteridinones (X = H, CH3, OCH3) is described.The oxidation of these compounds by (immobilized) Arthrobacter M-4 cells containing xanthine oxidase has been studied.The oxidation monitored by uv spectroscopy usually goes fast, except for 7-(pX-phenyl)-4(3H)-pteridinones (X = CH3, OCH3), which are slowly oxidized.With bacterial cells immobilized in gelatine crosslinked with glutaraldehyde small laboratory-scale oxidations were carried out.Based on spectral data the products of the oxidation reactions are 6- and 7-aryllumazines.

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