203387-22-8 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 203387-22-8 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,0,3,3,8 and 7 respectively; the second part has 2 digits, 2 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 203387-22:
(8*2)+(7*0)+(6*3)+(5*3)+(4*8)+(3*7)+(2*2)+(1*2)=108
108 % 10 = 8
So 203387-22-8 is a valid CAS Registry Number.
203387-22-8Relevant academic research and scientific papers
Synthesis of several new 5-nitro-1,4-benzothiazine and 6-nitro-1,5-benzothiazepine derivatives
Grandolini, Giuliano,Perioli, Luana,Ambrogi, Valeria
, p. 411 - 414 (2007/10/03)
Several new 2-substituted-5-nitro-1,4-benzothiazines and one 6-nitro-1,5-benzothiazepine were prepared starting from o-nitro-p-methoxyaniline via Herz reaction and successive cyclocondensation with appropriate halo acids.
