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221654-69-9

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221654-69-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 221654-69-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,2,1,6,5 and 4 respectively; the second part has 2 digits, 6 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 221654-69:
(8*2)+(7*2)+(6*1)+(5*6)+(4*5)+(3*4)+(2*6)+(1*9)=119
119 % 10 = 9
So 221654-69-9 is a valid CAS Registry Number.

221654-69-9Upstream product

221654-69-9Relevant articles and documents

Synthesis of 1-[(1R)-1-(6-fluoro-1,3-benzothiazol-2-yl)ethyl]-3-substituted phenyl ureas and their inhibition activity to acetylcholinesterase and butyrylcholinesterase

Pejchal, Vladimir,Stepankova, Sarka,Drabina, Pavel

experimental part, p. 57 - 62 (2011/03/21)

A series of novel 1-[(1R)-1-(6-fluoro-1,3-benzothiazol-2-yl)ethyl]-3- substituted phenyl ureas were synthesized by the condensation of (1R)-1-(6-fluoro-1,3-benzothiazol-2-yl)ethanamine with substituted phenyl isocyanates under mild conditions. Their structures were confirmed 1H, 13C, and 19F NMR spectra, and elemental analyses. The optical activities were confirmed by optical rotation measurements. The inhibition activity of 1-[(1R)-1-(6-fluoro-1,3-benzothiazol-2- yl)ethyl]-3-substituted phenyl ureas to acetylcholinesterase (ACHE) and butyrylcholinesterase (BCHE) was also tested. Preliminary bioassay indicated that the target ureas displayed excellent acetylcholinesterase and butyrylcholinesterase inhibition activity.

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