218949-52-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 218949-52-1 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,1,8,9,4 and 9 respectively; the second part has 2 digits, 5 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 218949-52:
(8*2)+(7*1)+(6*8)+(5*9)+(4*4)+(3*9)+(2*5)+(1*2)=171
171 % 10 = 1
So 218949-52-1 is a valid CAS Registry Number.
218949-52-1Relevant articles and documents
Synthesis of anti-rheumatic agent epoxyquinomicin B
Matsumoto, Naoki,Iinuma, Hironobu,Sawa, Tsutomu,Takeuchi, Tomio
, p. 2945 - 2948 (1998)
Anti-rheumatic agent (±)-epoxyquinomicin B was synthesized for a 22% overall yield in eight steps from commercially available 3-hydroxy-4- nitrobenzaldehyde via the intermediate quinone 6 prepared by selective phenol oxidation of 5 by use of Fremy's salt as the key step.
