218596-71-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 218596-71-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,1,8,5,9 and 6 respectively; the second part has 2 digits, 7 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 218596-71:
(8*2)+(7*1)+(6*8)+(5*5)+(4*9)+(3*6)+(2*7)+(1*1)=165
165 % 10 = 5
So 218596-71-5 is a valid CAS Registry Number.
218596-71-5Relevant academic research and scientific papers
Epalons: Synthesis of 3α,7β-dihydroxy-5α-pregnan-20-one
Chodounska, Hana,Kasal, Alexander
, p. 1543 - 1548 (2007/10/03)
3α,7α-Dihydroxy-5α-pregnan-20-one (12) was prepared from (20R)-pregn-5-ene-3β,20-diyl 3-acetate 20-benzoate (1). Δ5-Olefin was oxidized in an allylic position and hydrogenated. Inversion of a configuration at carbon C-3 was carried out by solvo
