51749-97-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 51749-97-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 5,1,7,4 and 9 respectively; the second part has 2 digits, 9 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 51749-97:
(7*5)+(6*1)+(5*7)+(4*4)+(3*9)+(2*9)+(1*7)=144
144 % 10 = 4
So 51749-97-4 is a valid CAS Registry Number.
51749-97-4Relevant academic research and scientific papers
2-SUBSTITUTED-S-TRIAZOLO[1,5A]-PYRIMIDINES
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, (2008/06/13)
2-Substituted-s-triazolo[1,5a]pyrimidines are disclosed which are useful as inhibitors of phosphodiesterase enzymes or intermediates in the production process. Such comoounds are of the following structure: wherein X, R, R1, R2 and R3 are as defined herei