552890-31-0 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 552890-31-0 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 5,5,2,8,9 and 0 respectively; the second part has 2 digits, 3 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 552890-31:
(8*5)+(7*5)+(6*2)+(5*8)+(4*9)+(3*0)+(2*3)+(1*1)=170
170 % 10 = 0
So 552890-31-0 is a valid CAS Registry Number.
552890-31-0Relevant articles and documents
Synthesis of JKLM ring fragment of ciguatoxin via acetylene-cobalt strategy
Baba, Takayuki,Isobe, Minoru
, p. 547 - 551 (2007/10/03)
A stereoselective synthesis of the JKLM ring fragment has been achieved through a coupling between two segments via heteroconjugate addition, seven-membered ether ring formation mediated by an acetylene cobalt complex and spiroketalization reaction.