141989-00-6 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 141989-00-6 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,4,1,9,8 and 9 respectively; the second part has 2 digits, 0 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 141989-00:
(8*1)+(7*4)+(6*1)+(5*9)+(4*8)+(3*9)+(2*0)+(1*0)=146
146 % 10 = 6
So 141989-00-6 is a valid CAS Registry Number.
141989-00-6Relevant articles and documents
Formal syntheses of (±)-methylenomycins A and B
Hong, Fang-Tsao,Lee, Kung-Shing,Liao, Chun-Chen
, p. 77 - 83 (2007/10/03)
The syntheses of methyl ester of (±)-desepoxy-4,5-didehydromethylenomycin A (4) and 2,3-dimethyl-5-methoxycarbonyl-2-cyclopentenone (5) were accomplished from a common starting material, 2,3-dimethyl-4-methoxyphenol (8), in only four and two steps in 35%