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256236-30-3

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256236-30-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 256236-30-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,5,6,2,3 and 6 respectively; the second part has 2 digits, 3 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 256236-30:
(8*2)+(7*5)+(6*6)+(5*2)+(4*3)+(3*6)+(2*3)+(1*0)=133
133 % 10 = 3
So 256236-30-3 is a valid CAS Registry Number.

256236-30-3Relevant articles and documents

Asymmetric total synthesis of talienbisflavan A

Huang, Deng-Ming,Li, Hui-Jing,Wang, Jun-Hu,Wu, Yan-Chao

supporting information, p. 585 - 592 (2018/02/07)

The first asymmetric total syntheses of talienbisflavan A and bis-8,8′-epicatechinylmethane as well as a facile synthesis of bis-8,8′-catechinylmethane has been accomplished from readily available starting materials by using a newly developed direct regio

Systematic synthesis of galloyl-substituted procyanidin B1 and B2, and their ability of DPPH radical scavenging activity and inhibitory activity of DNA polymerases

Saito, Akiko,Mizushina, Yoshiyuki,Ikawa, Hiroshi,Yoshida, Hiromi,Doi, Yuki,Tanaka, Akira,Nakajima, Noriyuki

, p. 2759 - 2771 (2007/10/03)

Six galloyl-substituted procyanidin B1 and B2, 3-O-gallate, 3″-O-gallate, and 3,3″-di-O-gallate, were systematically synthesized with the condensation method using TMSOTf as a catalyst. Their ability of DPPH radical scavenging activity and DNA polymerase inhibitory activity were also investigated. The results indicated that the galloyl group of these compounds is very important for both activities. 3,3″-Di-O-gallate dimers acted as strong inhibitor against DNA polymerase α and β, whereas the desgalloyl and monogalloyl compounds did not exhibit any appreciable inhibitory activity against the DNA polymerase β.

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