164159-91-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 164159-91-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,6,4,1,5 and 9 respectively; the second part has 2 digits, 9 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 164159-91:
(8*1)+(7*6)+(6*4)+(5*1)+(4*5)+(3*9)+(2*9)+(1*1)=145
145 % 10 = 5
So 164159-91-5 is a valid CAS Registry Number.
164159-91-5Relevant articles and documents
A practical regiospecific synthesis of 9-nitrocamptothecin
Fu, Qingquan,Chen, Zhiyong
, p. 1940 - 1942 (2007/10/03)
9-Nitrocamptothecin has shown potent antitumor activity against many types of human cancers. A practical scale-up procedure for this compound is reported by selective reduction of corresponding sulfonate. Georg Thieme Verlag Stuttgart.