219690-59-2 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 219690-59-2 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,1,9,6,9 and 0 respectively; the second part has 2 digits, 5 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 219690-59:
(8*2)+(7*1)+(6*9)+(5*6)+(4*9)+(3*0)+(2*5)+(1*9)=162
162 % 10 = 2
So 219690-59-2 is a valid CAS Registry Number.
219690-59-2Relevant academic research and scientific papers
Total synthesis of (+/-)-Nimbonone
Wang, Xiao-Feng,Zhou, Rong,Tian, Yuan,Chen, Ning,Pan, Xin-Fu,et al.
, p. 929 - 932 (2007/10/03)
A first expeditious total synthesis of (+/-)-Nimbonone 10, a novel naturally occuring diterpenoid isolated from the neem tree, is described. In order to induce the ethyl substituent, Friedel-Crafts acetylation and then decarbonylation have been employed as the key steps.
