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134557-58-7

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134557-58-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 134557-58-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,4,5,5 and 7 respectively; the second part has 2 digits, 5 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 134557-58:
(8*1)+(7*3)+(6*4)+(5*5)+(4*5)+(3*7)+(2*5)+(1*8)=137
137 % 10 = 7
So 134557-58-7 is a valid CAS Registry Number.

134557-58-7Relevant articles and documents

Synthesis of an α-CH2CO2H functionalized tryptophan and its incorporation into an analogue of cholecystokinin

Bourne,Horwell,Pritchard

, p. 4763 - 4774 (2007/10/02)

The synthesis of an α, α-bisubstituted tryptophan derivative (2) predicted by computer assisted molecular modelling to have close structural and conformational analogy to the endogenous neuropeptide cholecystokinin (CCK) is described. Central to the synth

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