74189-26-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 74189-26-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,4,1,8 and 9 respectively; the second part has 2 digits, 2 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 74189-26:
(7*7)+(6*4)+(5*1)+(4*8)+(3*9)+(2*2)+(1*6)=147
147 % 10 = 7
So 74189-26-7 is a valid CAS Registry Number.
74189-26-7Relevant academic research and scientific papers
6-(Substituted-hydroxymethylene penams)
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, (2008/06/13)
β-Lactams having a substituted hydroxymethylene group at the position α to the lactam carbonyl group are prepared by reaction of an α-halo-β-lactam with zinc or zinc amalgam in an anhydrous aprotic medium to produce an intermediate which in situ reacts wi
