201547-39-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 201547-39-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,0,1,5,4 and 7 respectively; the second part has 2 digits, 3 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 201547-39:
(8*2)+(7*0)+(6*1)+(5*5)+(4*4)+(3*7)+(2*3)+(1*9)=99
99 % 10 = 9
So 201547-39-9 is a valid CAS Registry Number.
201547-39-9Relevant articles and documents
Total synthesis of analogs of topostin B, A DNA topoisomerase I inhibitor. Part 3: Improved synthesis of topostin B-1 analogs
Fujiwara, Hideyasu,Aoyama, Toyohiko,Shioiri, Takayuki
, p. 551 - 564 (2007/10/03)
Analogs of (E)-topostin B-1 (1a-c) and (Z)-topostin B-1 (2a-c), an inhibitor of mammalian DNA topoisomerase I, have been synthesized in a convenient manner.
