557791-43-2 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 557791-43-2 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 5,5,7,7,9 and 1 respectively; the second part has 2 digits, 4 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 557791-43:
(8*5)+(7*5)+(6*7)+(5*7)+(4*9)+(3*1)+(2*4)+(1*3)=202
202 % 10 = 2
So 557791-43-2 is a valid CAS Registry Number.
557791-43-2Relevant academic research and scientific papers
Synthesis of (3S,4S)-3,4-dihydroxyprolines from L-tartaric acid
Arakawa,Yoshifuji
, p. 2219 - 2224 (2007/10/02)
Natural (2S,3S,4S)-3,4-dihydroxyproline (1) and the new (2R,3S,4S)-isomer (7) have been synthesized from L-tartaric acid via cyanosilylation of the cyclic Schiff base.
