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553662-54-7

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553662-54-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 553662-54-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 5,5,3,6,6 and 2 respectively; the second part has 2 digits, 5 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 553662-54:
(8*5)+(7*5)+(6*3)+(5*6)+(4*6)+(3*2)+(2*5)+(1*4)=167
167 % 10 = 7
So 553662-54-7 is a valid CAS Registry Number.

553662-54-7Upstream product

553662-54-7Relevant articles and documents

Synthesis of the JKLM-ring fragment of ciguatoxin

Baba, Takayuki,Huang, Guobin,Isobe, Minoru

, p. 6851 - 6872 (2007/10/03)

A stereoselective synthesis of the LM-ring fragment has been achieved starting from a sugar derivative. 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.

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