844-01-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 844-01-9 includes 6 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 3 digits, 8,4 and 4 respectively; the second part has 2 digits, 0 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 844-01:
(5*8)+(4*4)+(3*4)+(2*0)+(1*1)=69
69 % 10 = 9
So 844-01-9 is a valid CAS Registry Number.
844-01-9Relevant articles and documents
A convenient synthesis of 3-pyridinyl- and 3-pyrimidinylcoumarins
Zhang, Xuqing,Sui, Zhihua
, p. 2568 - 2572 (2006)
A mild and efficient synthesis of 3-pyridinyl- and 3-pyrimidinylcoumarins through one-pot tandem condensation-cyclization of various 2′- hydroxyacetophenones and pyridinyl- or pyrimidinylacetic acids is described. Georg Thieme Verlag Stuttgart.