190507-48-3 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 190507-48-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,9,0,5,0 and 7 respectively; the second part has 2 digits, 4 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 190507-48:
(8*1)+(7*9)+(6*0)+(5*5)+(4*0)+(3*7)+(2*4)+(1*8)=133
133 % 10 = 3
So 190507-48-3 is a valid CAS Registry Number.
190507-48-3Relevant academic research and scientific papers
Synthesis of 13-ethyl-17-hydroxy-11-methylene-18,19-dinor-17α-pregn-4- en-20-yn-3-one (3-oxo desogestrel)
Gao, Hongwu,Su, Xiangdong,Li, Zhensu
, p. 398 - 402 (2007/10/03)
A synthesis of the steroid hormone, 3-keto-desogestrel (1), with the total yield of 10% starting from d-13β-ethyl-3-methoxy-gona-1,3,5(10),8- tetraen-18β-ol (3) is described.
