193697-99-3 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 193697-99-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,9,3,6,9 and 7 respectively; the second part has 2 digits, 9 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 193697-99:
(8*1)+(7*9)+(6*3)+(5*6)+(4*9)+(3*7)+(2*9)+(1*9)=203
203 % 10 = 3
So 193697-99-3 is a valid CAS Registry Number.
193697-99-3Relevant academic research and scientific papers
A concise synthetic entry to substituted 2-Aminothieno[2,3- d]pyrimidines via a Gewald precursor
Zhang, Minsheng,Harper, Richard W.
, p. 1629 - 1634 (2007/10/03)
A concise synthesis of substituted 2-aminothieno[2,3-d]pyrimidines is described based on pyrimidine annulation of tetrasubstituted thiophene precursors assembled by a Gewald thiophene ring synthesis.
