89209-40-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 89209-40-5 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,9,2,0 and 9 respectively; the second part has 2 digits, 4 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 89209-40:
(7*8)+(6*9)+(5*2)+(4*0)+(3*9)+(2*4)+(1*0)=155
155 % 10 = 5
So 89209-40-5 is a valid CAS Registry Number.
89209-40-5Relevant academic research and scientific papers
Synthesis of the Two Enantiomers of a Tetrahydro-β-carboline from L-(-)-Tryptophan
Massiot, Georges,Mulamba, Tshilundu
, p. 1147 - 1149 (2007/10/02)
Pictet-Spengler condensations of methyl 4-formyl-2,2-bis(phenylthio)butyrate with tryptophanamide and Nb-benzyltryptophanamide are stereospecific; dehydration of the adducts followed by cyanide elimination (NaBH4) yields tetrahydro-
