80903-07-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 80903-07-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,0,9,0 and 3 respectively; the second part has 2 digits, 0 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 80903-07:
(7*8)+(6*0)+(5*9)+(4*0)+(3*3)+(2*0)+(1*7)=117
117 % 10 = 7
So 80903-07-7 is a valid CAS Registry Number.
80903-07-7Relevant academic research and scientific papers
Cephalosporins to carbapenems: 1-Oxygenated carbapenems and carbapenams
Rosati,Kapili,Morrissey,Retsema
, p. 291 - 297 (2007/10/02)
The photo 'Wolff' rearrangement of readily available 2-diazoceph-3-em oxides (1) directly affords carbapen-2-ems, allowing a facile entry into a ring system previously accessible only by total synthesis, lengthly semisynthesis or fermentation. The chirali
