128990-05-6 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 128990-05-6 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,2,8,9,9 and 0 respectively; the second part has 2 digits, 0 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 128990-05:
(8*1)+(7*2)+(6*8)+(5*9)+(4*9)+(3*0)+(2*0)+(1*5)=156
156 % 10 = 6
So 128990-05-6 is a valid CAS Registry Number.
128990-05-6Relevant academic research and scientific papers
Synthese totale d'isocephemes heterosubstitues en 3
Costerousse, Germain,Cagniant, Alain,Didierlaurent, Stanislas,Proust, Dominique,Teutsch, Georges
, p. 830 - 835 (2007/10/02)
Base promoted reaction of a suitably substituted N-carboxymethyl-azetidinone 9 with carbon disulfide or carbon oxysulfide, leads conveniently to 3-heterosubstituted-2-isocephems in good to excellent yield.
