Cas 219562-45-5,3-(toluene-4-sulfonyloxy)-17α-azido-1,3,5(10)-estratriene

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Check Digit Verification of cas no

The CAS Registry Mumber 219562-45-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,1,9,5,6 and 2 respectively; the second part has 2 digits, 4 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 219562-45:
(8*2)+(7*1)+(6*9)+(5*5)+(4*6)+(3*2)+(2*4)+(1*5)=145
145 % 10 = 5
So 219562-45-5 is a valid CAS Registry Number.

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219562-45-5Relevant articles and documents

A comparative structural study of the steroid epimers: 17β-Amino- 1,3,5(10)estratrien-3-ol, 17α-amino-1,3,5(10)-estratrien-3-ol, and some derivatives by 1H NMR, and x-ray diffraction analysis

Lemini, Cristina,Cruz-Ramos, Elia,Toscano, Ruben Alfredo,Cruz-Almanza, Raymundo

, p. 556 - 564 (2007/10/03)

The epimers 17β-amino-1,3,5(10)-estratrien-3-ol and 17α-amino- 1,3,5(10)-estratrien-3-ol were synthesized. 17β-Amino-1,3,5(10)-estratrien- 3-ol was prepared by catalytic hydrogenation of the estrone-oxime. The 17α- amino epimer was obtained from estradiol

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219562-45-5