304436-21-3 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 304436-21-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 3,0,4,4,3 and 6 respectively; the second part has 2 digits, 2 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 304436-21:
(8*3)+(7*0)+(6*4)+(5*4)+(4*3)+(3*6)+(2*2)+(1*1)=103
103 % 10 = 3
So 304436-21-3 is a valid CAS Registry Number.
304436-21-3Relevant articles and documents
Asymmetric synthesis of febrifugine and isofebrifugine using yeast reduction
Takeuchi,Azuma,Takakura,Abe,Harayama
, p. 1643 - 1644 (2000)
The antimalarial agents febrifugine ((+)-1) and isofebrifugine ((+)-2) were asymmetrically synthesized from chiral piperidin-3-ol ((+)-4), which was prepared by the reductive dynamic optical resolution of the 3-piperidone derivatives ((±)-3) using baker's