159140-89-3 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 159140-89-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,5,9,1,4 and 0 respectively; the second part has 2 digits, 8 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 159140-89:
(8*1)+(7*5)+(6*9)+(5*1)+(4*4)+(3*0)+(2*8)+(1*9)=143
143 % 10 = 3
So 159140-89-3 is a valid CAS Registry Number.
159140-89-3Relevant academic research and scientific papers
THE CHEMISTRY OF CYCLIC TAUTOMERS OF TRYPTOPHAN: HIGHLY DIASTEREOSELECTIVE ALDOL CONDENSATIONS
Crich, David,Pastrana-Gress, Isaura,Quintero-Cortes, Leticia,Sandoval-Ramirez, Jesus
, p. 719 - 724 (2007/10/02)
Highly diastereoselective aldol reactions of a cyclic tryptophan tautomer (1) are reported, together with stereochemical assignments of the products and a possible rationale for the selectivity.
