189558-00-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 189558-00-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,8,9,5,5 and 8 respectively; the second part has 2 digits, 0 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 189558-00:
(8*1)+(7*8)+(6*9)+(5*5)+(4*5)+(3*8)+(2*0)+(1*0)=187
187 % 10 = 7
So 189558-00-7 is a valid CAS Registry Number.
189558-00-7Relevant articles and documents
Total synthesis of (+)-paulownin
Okazaki, Momotoshi,Ishibashi, Fumito,Shuto, Yoshihiro,Taniguchi, Eiji
, p. 743 - 745 (2007/10/03)
(+)-Paulownin, a furofuran lignan from Paulownia tomentosa, was stereoselectively synthesized from (R)-(+)-3-hydroxybutanolide in 12 steps with a yield of 4.4%.
