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113697-97-5

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113697-97-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 113697-97-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,1,3,6,9 and 7 respectively; the second part has 2 digits, 9 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 113697-97:
(8*1)+(7*1)+(6*3)+(5*6)+(4*9)+(3*7)+(2*9)+(1*7)=145
145 % 10 = 5
So 113697-97-5 is a valid CAS Registry Number.

113697-97-5Relevant articles and documents

Lipophilic 5,6,7,8-tetrahydropterin substrates for phenylalanine hydroxylase (monkey brain), tryptophan hydroxylase (rat brain) and tyrosine hydroxylase (rat brain)

Armarego, Wilfred L. F.,Taguchi, Hiroyasu,Cotton, Richard G. H.,Battiston, Sandra,Leong, Lillian

, p. 283 - 292 (2007/10/02)

A high yielding unambiguous synthesis of (+/-)-6-alkyl-5,6,7,8-tetrahydropterin 5a-f hydrochlorides starting from ethyl α-isocyanoacetate 1 and the respective alkanoic anhydrides or alkanoyl chlorides in four steps is described.All the six pterins 5a-f that have been synthesised are substrates for mammalian phenylalanine, tryptophan and tyrosine hydroxylases and their activities have been compared with those of natural 6R-tetrahydrobiopterin under similar conditions.The data allowed the choice of 6-n-propyl-5,6,7,8-tetrahydropterin 5c for further studies as a candidate for tetrahydrobiopterin drug therapy.Keywords: (+/-)-6-alkyltetrahydropterinsydroxylase / tryptophan hydroxylase / tyrosine hydroxylase

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