138957-23-0 Usage
Chemical Properties
Light Yellow Foam Solid
Uses
Intermediate in the preparation of Cyclosporin A
Check Digit Verification of cas no
The CAS Registry Mumber 138957-23-0 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,8,9,5 and 7 respectively; the second part has 2 digits, 2 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 138957-23:
(8*1)+(7*3)+(6*8)+(5*9)+(4*5)+(3*7)+(2*2)+(1*3)=170
170 % 10 = 0
So 138957-23-0 is a valid CAS Registry Number.
138957-23-0Relevant articles and documents
Synthesis of the Main Metabolite (OL-17) of Cyclosporin A
Eberle, Marcel K.,Nuninger, Francois
, p. 2689 - 2691 (2007/10/02)
Acetyl-cyclosporin A (2) was subjected to the conditions of allylic radical bromination to give 3.Exchange of the bromide by acetoxy led to 4 which was hydrolyzed to the known metabolite OL-17 (5) of cyclosporin A (1).