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33973-22-7

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33973-22-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 33973-22-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 3,3,9,7 and 3 respectively; the second part has 2 digits, 2 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 33973-22:
(7*3)+(6*3)+(5*9)+(4*7)+(3*3)+(2*2)+(1*2)=127
127 % 10 = 7
So 33973-22-7 is a valid CAS Registry Number.

33973-22-7Relevant articles and documents

Antimalarial and structural studies of pyridine-containing inhibitors of 1-deoxyxylulose-5-phosphate reductoisomerase

Xue, Jian,Diao, Jiasheng,Cai, Guobin,Deng, Lisheng,Zheng, Baisong,Yao, Yuan,Song, Yongcheng

, p. 278 - 282 (2013/03/29)

1-Deoxy-d-xylulose-5-phosphate reductoisomerase (DXR) in the nonmevalonate isoprene biosynthesis pathway is a target for developing antimalarial drugs. Fosmidomycin, a potent DXR inhibitor, showed safety as well as efficacy against Plasmodium falciparum malaria in clinical trials. On the basis of our previous quantitative structure-activity relationship (QSAR) and crystallographic studies, several novel pyridine-containing fosmidomycin derivatives were designed, synthesized, and found to be highly potent inhibitors of P. falciparum DXR (PfDXR) having Ki values of 1.9-13 nM, with the best one being ~11× more active than fosmidomycin. These compounds also potently block the proliferation of multidrug resistant P. falciparum with EC 50 values as low as 170 nM. A 2.3 A? crystal structure of PfDXR in complex with one of the inhibitors is reported, showing that the flexible loop of the protein undergoes conformational changes upon ligand binding and a hydrogen bond and favorable hydrophobic interactions between the pyridine group and the PfDXR account for the enhanced activity.

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