221617-24-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 221617-24-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,2,1,6,1 and 7 respectively; the second part has 2 digits, 2 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 221617-24:
(8*2)+(7*2)+(6*1)+(5*6)+(4*1)+(3*7)+(2*2)+(1*4)=99
99 % 10 = 9
So 221617-24-9 is a valid CAS Registry Number.
221617-24-9Relevant articles and documents
Radical cyclizations. A convergent total synthesis of (±)-γ-Lycorane
Cossy, Janine,Tresnard, Ludovic,Gomez Pardo, Domingo
, p. 1125 - 1128 (1999)
(±)-γ-Lycorane has been synthesized in 10 steps from piperonylic alcohol. Two radical reactions were used successively to build the D and B rings.