219653-03-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 219653-03-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,1,9,6,5 and 3 respectively; the second part has 2 digits, 0 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 219653-03:
(8*2)+(7*1)+(6*9)+(5*6)+(4*5)+(3*3)+(2*0)+(1*3)=139
139 % 10 = 9
So 219653-03-9 is a valid CAS Registry Number.
219653-03-9Relevant articles and documents
Positively charged deoxynucleic methylthioureas: Synthesis and binding properties of pentameric thymidyl methylthiourea
Arya, Dev P.,Bruice, Thomas C.
, p. 12419 - 12427 (2007/10/03)
The negatively charged phosphodiester linkages in DNA {-O(PO2-)O-} have been replaced by a novel methylthiourea {-NHC(=SMe+)NH-} backbone. The backbone is positively charged, achiral, and stable and can be easily synthesiz