143958-70-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 143958-70-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,4,3,9,5 and 8 respectively; the second part has 2 digits, 7 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 143958-70:
(8*1)+(7*4)+(6*3)+(5*9)+(4*5)+(3*8)+(2*7)+(1*0)=157
157 % 10 = 7
So 143958-70-7 is a valid CAS Registry Number.
143958-70-7Relevant academic research and scientific papers
Preparation method of 1,7-dimethylxanthine
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, (2019/06/27)
The invention provides a preparation method of 1,7-dimethylxanthine. The method specifically includes firstly, a compound (III) reacts with a methylation reagent in a certain solvent in the presence or absence of alkali to obtain a compound (II); secondly
