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1257403-43-2

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1257403-43-2 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1257403-43-2 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,2,5,7,4,0 and 3 respectively; the second part has 2 digits, 4 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 1257403-43:
(9*1)+(8*2)+(7*5)+(6*7)+(5*4)+(4*0)+(3*3)+(2*4)+(1*3)=142
142 % 10 = 2
So 1257403-43-2 is a valid CAS Registry Number.

1257403-43-2Upstream product

1257403-43-2Downstream Products

1257403-43-2Relevant academic research and scientific papers

A formal total synthesis of fostriecin by a convergent approach

Li, Deyao,Zhao, Yu,Ye, Liu,Chen, Chaonan,Zhang, Jiancun

, p. 3325 - 3331 (2010)

A formal total synthesis of fostriecin has been accomplished in 20 steps. Our method features the derivation of two of the four chiral centers from commercial diethyl d-(+)-malate. The key steps involve the Julia-Kocienski olefination, the Sharpless asymmetric dihydroxylation, and the Stille coupling.

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