127648-19-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 127648-19-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,2,7,6,4 and 8 respectively; the second part has 2 digits, 1 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 127648-19:
(8*1)+(7*2)+(6*7)+(5*6)+(4*4)+(3*8)+(2*1)+(1*9)=145
145 % 10 = 5
So 127648-19-5 is a valid CAS Registry Number.
127648-19-5Relevant academic research and scientific papers
Synthesis of 6-Vinylidenepenams
Buynak, John D.,Borate, H. B.,Lamb, Grady W.,Khasnis, Dipti D.,Husting, Chad,et al.
, p. 1325 - 1335 (2007/10/02)
The preparation of unique penicillin derivatives containing an exocyclic allene at the 6 position (6-vinylidenepenams) is described.The synthetic scheme utilizes 6-oxopenicillinates as intermediates which stereospecifically add acetylide anions forming pr
