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340266-37-7

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340266-37-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 340266-37-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 3,4,0,2,6 and 6 respectively; the second part has 2 digits, 3 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 340266-37:
(8*3)+(7*4)+(6*0)+(5*2)+(4*6)+(3*6)+(2*3)+(1*7)=117
117 % 10 = 7
So 340266-37-7 is a valid CAS Registry Number.

340266-37-7Relevant articles and documents

Process for producing atorvastatin hemicalcium

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Page/Page column 9, (2008/06/13)

A process is provided for preparing pharmaceutical grade atorvastatin hemicalcium salt comprising: (a) deesterifying, wherein R is an ester protecting group to (b) extracting R(R*,R*)-3 into an organic solvent or mixture of solvents, (c) adding a base of formula NR1R2R3 wherein R1, R2 and R3 are independently selected from H, substituted or non-substituted C1 to C7 alkyl, C6 to C9 aryl, C8 to C10 aralkyl or aminoalkyl to form atorvastatin base salt, (d) isolating by precipitation of the above atorvastatin base salt and purifying when necessary,

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