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21919-63-1

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21919-63-1 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 21919-63-1 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,1,9,1 and 9 respectively; the second part has 2 digits, 6 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 21919-63:
(7*2)+(6*1)+(5*9)+(4*1)+(3*9)+(2*6)+(1*3)=111
111 % 10 = 1
So 21919-63-1 is a valid CAS Registry Number.

21919-63-1Relevant articles and documents

3-acetoxy-6-hydroxy-2,4-dimethoxyacetophenone

Mukherjee, Shubhasish,Parmar, Virinder S.,Errington, William

, p. 123 - 125 (1998)

The title compound, C12H14O6, has been isolated from a Fries reaction on 3,6-dihydroxy-2,4-dimethoxyacetophenone. Its molecular structure contains an intramolecular hydrogen-bonded unit involving the -COCH3 and -OH substituents. The best plane through the acetoxy group makes a dihedral angle of 88.74 (5)° with the plane of the aromatic ring.

4',5,6,7-OXYGENATED FLAVONES AND FLAVANONES.

STOUT,REICH,HUFFMAN

, p. 192 - 195 (2007/10/08)

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