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117559-50-9

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117559-50-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 117559-50-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,1,7,5,5 and 9 respectively; the second part has 2 digits, 5 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 117559-50:
(8*1)+(7*1)+(6*7)+(5*5)+(4*5)+(3*9)+(2*5)+(1*0)=139
139 % 10 = 9
So 117559-50-9 is a valid CAS Registry Number.

117559-50-9Relevant articles and documents

Quinazoline Antifolates Inhibiting Thymidylate Synthase: Synthesis of Four Oligo(L-γ-glutamyl) Conjugates of N10-Propargyl-5,8-dideazafolic Acid and Their Enzyme Inhibition

Pawelczak, Krzysztof,Jones, Terence R.,Kempny, Michal,Jackman, Ann L.,Newell, David R.,et al.

, p. 160 - 165 (2007/10/02)

The synthesis is described of four oligo(γ-glutamyl) conjugates of N10-propargyl-5,8-dideazafolic acid containing a total of two, three, four, and five L-glutamic acid residues.The tert-butyl group was chosen as the carboxyl protecting group in

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