74637-93-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 74637-93-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,4,6,3 and 7 respectively; the second part has 2 digits, 9 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 74637-93:
(7*7)+(6*4)+(5*6)+(4*3)+(3*7)+(2*9)+(1*3)=157
157 % 10 = 7
So 74637-93-7 is a valid CAS Registry Number.
74637-93-7Relevant academic research and scientific papers
Improved synthesis of Watasenia preluciferin
Kakoi, Hisac,Inoue, Shoji
, p. 1669 - 1672 (2007/10/03)
On heating a mixture of 2-amino-3-benzyl-5-(p-hydroxyphenyl)pyrazine (2) and a large excess of p-hydroxyphenylpyruvic acid (4) at 130-140 °C in dioxane, without any reductive treatment, Watasenia preluciferin (1) was obtained directly in one batch process in 63% yield.
