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78641-69-7

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78641-69-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 78641-69-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,8,6,4 and 1 respectively; the second part has 2 digits, 6 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 78641-69:
(7*7)+(6*8)+(5*6)+(4*4)+(3*1)+(2*6)+(1*9)=167
167 % 10 = 7
So 78641-69-7 is a valid CAS Registry Number.

78641-69-7Relevant articles and documents

3,5-DINITRO-1-(4-NITROPHENYL)-4-PYRIDONE, A NOVEL AND CONVENIENT PROTECTING REAGENT FOR PRIMARY AMINES.

Matsumura,Kobayashi,Nishikawa,Ariga,Tohda,Kawashima

, p. 1961 - 1965 (2007/10/02)

Crystalline derivatives of the following L-amino acids modified by 2,5-dinitro-4-pyridone have been prepared: glycine, alanine, valine, leucine, isoleucine, phenylalanine, serine, threonine, tyrosine, aspartic acid, asparagine, glutamic acid, glutamine, tryptophan, histidine, arginine, methionine and lysine. The modified L-amino acids (DNPY-L-amino acids) could be purified by recrystallization and were characterized by **1H-NMR, IR and UV spectral data. The molar rotation of the DNPY-L-amino acids varied from 2 to 100 times those of the parent amino acids. The effectiveness of 3,5-dinitro-1-(4-nitrophenyl)-4-pyridone as an amino-protecting reagent of L-amino acids is described.

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