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126821-31-6

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126821-31-6 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 126821-31-6 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,2,6,8,2 and 1 respectively; the second part has 2 digits, 3 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 126821-31:
(8*1)+(7*2)+(6*6)+(5*8)+(4*2)+(3*1)+(2*3)+(1*1)=116
116 % 10 = 6
So 126821-31-6 is a valid CAS Registry Number.

126821-31-6Upstream product

126821-31-6Relevant articles and documents

Chemistry of tricarbonyl hemiketals and application of Evans' technology to the total synthesis of the immunosuppressant (-)-FK-506

Jones,Reamer,Desmond,Mills

, p. 2998 - 3017 (2007/10/02)

Details of model studies probing the chemistry of the tricarbonyl region of FK-506 are presented, and their use in designing a successful route to this immunosuppressant is outlined. Application of asymmetric oxazolidinone alkylation/aldol methodology to a convergent, highly flexible synthesis of the C10-C18 fragment and to improvements in the preparation of the C20-C34 segment are also discussed.

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