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157639-01-5

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157639-01-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 157639-01-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,5,7,6,3 and 9 respectively; the second part has 2 digits, 0 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 157639-01:
(8*1)+(7*5)+(6*7)+(5*6)+(4*3)+(3*9)+(2*0)+(1*1)=155
155 % 10 = 5
So 157639-01-5 is a valid CAS Registry Number.

157639-01-5Relevant articles and documents

New DNA binding ligands as a model of chromomycin A3

Imoto, Shuhei,Haruta, Yoshinari,Watanabe, Kyouichi,Sasaki, Shigeki

, p. 4855 - 4859 (2007/10/03)

Small molecules with DNA-binding affinity within the minor groove have become of great interest. In this study, new DNA-binding ligands were designed to mimic Chromomycin A3 (CRA3), which contains a hydroxylated tetrahydroanthracene

Enantiodivergent syntheses of (R)- and (S)- 3,5-dimethylcyclohex-2-en-1- ones from (R)-pulegone

Nangia,Prasuna

, p. 1989 - 1998 (2007/10/02)

R-(+)-pulegone (1) is transformed to (R)-5-methyl-2- (phenylsulfinyl)cyclohexanone (5) (65%, 3 steps). Sulfoxide 5 is converted to R-(-)-3,5-dimethylcyclohex-2-en-1-one (4) (53%, 4 steps) and S-(+)-4 (26%, 3 steps).

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