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81520-58-3

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81520-58-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 81520-58-3 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,1,5,2 and 0 respectively; the second part has 2 digits, 5 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 81520-58:
(7*8)+(6*1)+(5*5)+(4*2)+(3*0)+(2*5)+(1*8)=113
113 % 10 = 3
So 81520-58-3 is a valid CAS Registry Number.

81520-58-3Downstream Products

81520-58-3Relevant articles and documents

Stereoselective Synthesis via Claisen Rearrangements of the Marine Sterols Occelasterol, Patinosterol, and 22,23-Dihydrooccelasterol

Hirano, Yutaka,Djerassi, Carl

, p. 2420 - 2426 (2007/10/02)

Occelasterol (1a), patinosterol (2a), 22,23-dihydrooccelasterol (3a), and their 24-stereoisomers (1b, 2b, and 3b) were stereoselectively synthesized.The i-methyl ether 6, derived from stigmasterol, was coupled with propynylmagnesium bromide to afford an e

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