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74670-14-7

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74670-14-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 74670-14-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,4,6,7 and 0 respectively; the second part has 2 digits, 1 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 74670-14:
(7*7)+(6*4)+(5*6)+(4*7)+(3*0)+(2*1)+(1*4)=137
137 % 10 = 7
So 74670-14-7 is a valid CAS Registry Number.

74670-14-7Downstream Products

74670-14-7Relevant articles and documents

13C-Nuclear Magnetic Resonance (NMR) Spectral Studies on Polysubstituted Flavonoids. I. 13C-NMR Spectra of Flavones

Iinuma, Munekazu,Matsuura, Shin,Kusuda, Kousuke

, p. 708 - 716 (2007/10/02)

The 13C-NMR spectra of 61 flavone derivatives were measured in dimethyl sulfoxide.By consideration of the chemical shifts of skeletal carbons, the parameters (α and β values) and correction factor (o value) necessary for calculating their carbon shifts were deduced.The skeletal carbons of polysubstituted flavones and flavonols could easily be assigned by the use of these values and SCS of OMe or OH.The 13C-NMR spectra were confirmed to give useful information that could not be obtained from other spectral data.The data were applied for the structure elucidation of unknown polysubstituted flavones.Keywords - 13C-NMR spectra; polysubstituted flavones; α value; β value; o value; extensive additivity rule

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