109989-74-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 109989-74-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,0,9,9,8 and 9 respectively; the second part has 2 digits, 7 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 109989-74:
(8*1)+(7*0)+(6*9)+(5*9)+(4*8)+(3*9)+(2*7)+(1*4)=184
184 % 10 = 4
So 109989-74-4 is a valid CAS Registry Number.
109989-74-4Relevant academic research and scientific papers
ADDITION OF PENICILLIN GRIGNARDS TO GLYOXALS A SYNTHESIS OF NOVEL PENAM KETOALCOHOLS
Reed, Larry A. III,Charleson, Dan A.,Volkmann, Robert A.
, p. 3431 - 3434 (2007/10/02)
The condensation of penicillin Grignards with substituted glyoxals leads to the synthesis of novel penam α-ketoalcohol antibacterials which are structurally related to several clinically useful penicillins.
