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169130-15-8

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169130-15-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 169130-15-8 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,6,9,1,3 and 0 respectively; the second part has 2 digits, 1 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 169130-15:
(8*1)+(7*6)+(6*9)+(5*1)+(4*3)+(3*0)+(2*1)+(1*5)=128
128 % 10 = 8
So 169130-15-8 is a valid CAS Registry Number.

169130-15-8Relevant articles and documents

Studies of the selective O-alkylation and dealkylation of flavonoids. XIX. A convenient method for synthesizing 3,5,6,7,8-pentaoxygenated flavones

Horie,Kawamura,Yamamoto,Yamashita

, p. 2054 - 2063 (2007/10/03)

The methoxymethyl ethers of 6-hydroxy-5,7,8-trimethoxyflavones, which were derived from 2',5'dihydroxy-3',4',6'-trimethoxyacetophenone, were oxidized with dimethyldioxirane to give the corresponding 3-hydroxyflavones. Selective O-alkylation and dealkylation of the 3-hydroxyflavones were examined and a convenient method for synthesizing the following ten kinds of 3,5,6,7,8- pentaoxygenated flavones was established: 3-hydroxy-5,6,7,8- tetramethoxyflavones, 3,5-dihydroxy-6,7,8-trimethoxyflavones, 3,6-dihydroxy- 5,7,8-trimethoxyflavones, 3,5,6-trihydroxy-7,8-dimethoxyflavones, 3,5,6,7- tetrahydroxy-8-methoxyflavones, and their 3-methyl ethers. Furthermore, 3,5,8-trihydroxy-4',6,7-trimethoxyflavone, 3,8-dihydroxy-4',5,6,7- tetramethoxyflavone, and 5,8-dihydroxy-3,6,7-trimethoxyflavones were similarly synthesized and their spectral properties were examined. Additionally, the proposed structures of three natural flavones were revised.

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