1723-42-8 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 1723-42-8 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 1,7,2 and 3 respectively; the second part has 2 digits, 4 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 1723-42:
(6*1)+(5*7)+(4*2)+(3*3)+(2*4)+(1*2)=68
68 % 10 = 8
So 1723-42-8 is a valid CAS Registry Number.
InChI:InChI=1/C8H2Cl2N2O6/c9-7(13)3-1-4(8(10)14)6(12(17)18)2-5(3)11(15)16/h1-2H
1723-42-8Relevant articles and documents
Aromatic oligoureas: Enforced folding and assisted cyclization
Zhang, Aimin,Han, Yaohua,Yamato, Kazuhiro,Zeng, Xiao Cheng,Gong, Bing
, p. 803 - 806 (2007/10/03)
Aromatic oligoureas are forced into well-defined conformation by incorporated intramolecular hydrogen bonds. Shape-persistent tetraureas macrocycles were obtained in a one-step [2 + 2] reaction in good yields.