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294177-64-3

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294177-64-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 294177-64-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,9,4,1,7 and 7 respectively; the second part has 2 digits, 6 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 294177-64:
(8*2)+(7*9)+(6*4)+(5*1)+(4*7)+(3*7)+(2*6)+(1*4)=173
173 % 10 = 3
So 294177-64-3 is a valid CAS Registry Number.

294177-64-3Downstream Products

294177-64-3Relevant articles and documents

Tyrosinase inhibitory effects and antioxidative activities of novel cinnamoyl amides with amino acid ester moiety

Fan, Qian,Jiang, Hong,Yuan, Er-Dong,Zhang, Jian-Xun,Ning, Zheng-Xiang,Qi, Sui-Jian,Wei, Qing-Yi

, p. 1081 - 1087 (2012)

Nine cinnamoyl amides with amino acid ester (CAAE) moiety were synthesized by the conjugation of the corresponding cinnamic acids (cinnamic acid, 4-hydroxy cinnamic acid, ferulic acid and caffeic acid) with amino acid esters, and their inhibitory effects on the activities of mushroom tyrosinase were investigated, using l-3,4-dihydroxyl-phenylalanine (l-DOPA) as the substrate. Among these CAAE amides, ethyl N-[3-(4-hydroxy-3-methoxyphenyl)-1-oxo-2-propen-1-yl]-l- phenylalaninate (b4) showed the strongest inhibitory activity; the IC50 was 0.18 μM. The IC50 values, inhibition types, inhibition mechanisms and kinetics of all these CAAE amides were evaluated. A structure-activity relationship (SAR) study found that the inhibitory effects were potentiated with the increasing length of hydrocarbon chains at the amino acid esters and also influenced by the substituents at the styrene groups. Furthermore, the hydroxyl radical scavenging and anti-lipid peroxidation activities of four CAAE derivatives were also investigated. Among these compounds, b3 (ethyl N-[3-(3,4-dihydroxyphenyl)-1-oxo-2-propen-1-yl]- l-phenylalaninate) and b4 exhibited potential antioxidant activities.

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