53900-05-3 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 53900-05-3 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 5,3,9,0 and 0 respectively; the second part has 2 digits, 0 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 53900-05:
(7*5)+(6*3)+(5*9)+(4*0)+(3*0)+(2*0)+(1*5)=103
103 % 10 = 3
So 53900-05-3 is a valid CAS Registry Number.
53900-05-3Relevant academic research and scientific papers
The synthesis of nor- and bisnorlupanes
Wahhab, Amal,Ottosen, Margaret,Bachelor, Frank W.
, p. 570 - 577 (2007/10/02)
In course of our studies on geochemical biomarkers we required a series of lupane standards.We report here an efficient synthesis of lupane (1) in three steps from betulin (3) in an overall yield of 47.2 percent. 17β(H)-28-Norlupane (2) was obtained in 90
