189454-30-6 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 189454-30-6 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,8,9,4,5 and 4 respectively; the second part has 2 digits, 3 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 189454-30:
(8*1)+(7*8)+(6*9)+(5*4)+(4*5)+(3*4)+(2*3)+(1*0)=176
176 % 10 = 6
So 189454-30-6 is a valid CAS Registry Number.
189454-30-6Relevant articles and documents
Synthesis of unnatural hydroxyanthraquinones : Experiments towards total synthesis of pradimicinone
Murty,Hazra,Datta,Mal
, p. 126 - 132 (2007/10/03)
The phthalide sulfone 5 has been prepared from readily available ester 6 in four steps on multigram scales. This has been utilized in anionic [4 + 2] cycloaddition with a few cyclohexenones (12-14) to obtain anthraquinones (18-26) in good yields, compound