136833-57-3 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 136833-57-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,6,8,3 and 3 respectively; the second part has 2 digits, 5 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 136833-57:
(8*1)+(7*3)+(6*6)+(5*8)+(4*3)+(3*3)+(2*5)+(1*7)=143
143 % 10 = 3
So 136833-57-3 is a valid CAS Registry Number.
136833-57-3Relevant academic research and scientific papers
A convenient large scale synthesis of 7α-formamido cephalosporins
Berry,Brown,Hanson,Kaura,Milner,Moores,Quick,Saunders,Southgate,Whitall
, p. 2683 - 2686 (2007/10/02)
The development of a convenient 'one pot' synthesis of 7α-formamido ACA(12)from 7-ACA(2) via quinone methide methodology is described.
