138944-12-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 138944-12-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,8,9,4 and 4 respectively; the second part has 2 digits, 1 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 138944-12:
(8*1)+(7*3)+(6*8)+(5*9)+(4*4)+(3*4)+(2*1)+(1*2)=154
154 % 10 = 4
So 138944-12-4 is a valid CAS Registry Number.
138944-12-4Relevant articles and documents
One-pot synthesis of rufloxacin
Cecchetti,Fravolini,Schiaffella
, p. 2301 - 2308 (1991)
Rufloxacin (MF-934) was prepared in one-pot synthesis in 61% yield by treatment of the 2,3,5-trifluoro-4-(4-methyl-1-piperazinyl)-benzoyl acetate, first with N,N-dimethylformamide dimethyl acetal, then with 2-aminoethanethiol, followed by cyclization and
