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137553-45-8

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137553-45-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 137553-45-8 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,7,5,5 and 3 respectively; the second part has 2 digits, 4 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 137553-45:
(8*1)+(7*3)+(6*7)+(5*5)+(4*5)+(3*3)+(2*4)+(1*5)=138
138 % 10 = 8
So 137553-45-8 is a valid CAS Registry Number.

137553-45-8Relevant articles and documents

2,4-Diamino-5-substituted-quinazolines as inhibitors of a human dihydrofolate reductase with a site-directed mutation at position 22 and of the dihydrofolate reductases from Pneumocystis carinii and Toxoplasma gondii

Rosowsky,Mota,Queener,Waltham,Ercikan-Abali,Bertino

, p. 745 - 752 (2007/10/02)

2,4-Diaminoquinazoline antifolates with a lipophilic side chain at the 5- position, and in one case with a classical (p-aminobenzoyl)-L-glutamate side chain, were synthesized as potentially selective inhibitors of a site- directed mutant of human dihydrof

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