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128540-54-5

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128540-54-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 128540-54-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,2,8,5,4 and 0 respectively; the second part has 2 digits, 5 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 128540-54:
(8*1)+(7*2)+(6*8)+(5*5)+(4*4)+(3*0)+(2*5)+(1*4)=125
125 % 10 = 5
So 128540-54-5 is a valid CAS Registry Number.

128540-54-5Relevant articles and documents

A Practical Synthesis of threo-3-Amino-2-hydroxycarboxylic Acids

Matsuda, Fuyuhiko,Mtsumoto, Teruyo,Ohsaki, Masako,Ito, Yoshio,Terashima, Shiro

, p. 360 - 365 (2007/10/02)

An expeditious synthesis of (2R,3S)-3-amino-4-cyclohexyl-2-hydroxybutyric acid (2) and (2S,3R)-3-amino-2-hydroxy-4-phenylbutyric acid (4), the key components of the renin inhibitor (1) and bestatin (3), respectively, have been accomplished by featuring hi

An expeditious synthesis of (3S,4S)-statine and (3S,4S)cyclohexylstatine

Takemoto, Yoshiji,Matsumoto, Teruyo,Ito, Yoshio,Terashima, Shiro

, p. 217 - 218 (2007/10/02)

The title synthesis could be accomplished by employing highly stereoselective aldol reaction of O-methyl-O-trimethylsilyl ketene acetal with the (S)-α-amido aldehyde (2) in the presence of titanium (IV) chloride as a key step.

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