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199928-04-6

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199928-04-6 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 199928-04-6 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,9,9,9,2 and 8 respectively; the second part has 2 digits, 0 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 199928-04:
(8*1)+(7*9)+(6*9)+(5*9)+(4*2)+(3*8)+(2*0)+(1*4)=206
206 % 10 = 6
So 199928-04-6 is a valid CAS Registry Number.

199928-04-6Relevant articles and documents

Synthesis of a pyrido[2,3-d]pyrimidine analogue of the multitargeted antifolate LY231514

Taylor, Edward C.,Lee, Koo

, p. 2229 - 2237 (2007/10/03)

Syntheses of pyrido[2,3-d]pyrimidines (9) and (21), ring-expanded analogues of the antitumor agent LY231514 (7), and its 4-amino analog, respectively, are described. Preliminary in vitro cell culture evaluation has shown that expansion of the pyrrole ring of the latter two pyrrolo[2,3-d]pyrimidines through introduction of a carbonyl group between positions 6 and 7 results in complete loss of cell growth inhibitory activity.

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