87154-04-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 87154-04-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,7,1,5 and 4 respectively; the second part has 2 digits, 0 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 87154-04:
(7*8)+(6*7)+(5*1)+(4*5)+(3*4)+(2*0)+(1*4)=139
139 % 10 = 9
So 87154-04-9 is a valid CAS Registry Number.
87154-04-9Relevant academic research and scientific papers
Synthesis and biological activity of enantiomeric oxapenemcarboxylic acids
Pfaendler,Neumann,Bartsch
, p. 1179 - 1184 (2007/10/02)
The synthesis of enantiomerically pure potassium (5R)- and (5S)-trans-2-tert-butyl-6-hydroxymethyloxapenem-3-carboxylates is reported. Surprisingly, both enantiomers were active antibiotics and β-lactamase inhibitors.
