219700-83-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 219700-83-1 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,1,9,7,0 and 0 respectively; the second part has 2 digits, 8 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 219700-83:
(8*2)+(7*1)+(6*9)+(5*7)+(4*0)+(3*0)+(2*8)+(1*3)=131
131 % 10 = 1
So 219700-83-1 is a valid CAS Registry Number.
219700-83-1Relevant articles and documents
Synthesis of new Lichen tridepsides
Elix, John A.,Jayanthi, Vilas K.,McCaffery, Leslie F.,Yu, Jin
, p. 1045 - 1052 (2007/10/03)
The unambiguous total synthesis of ten O-methyl and/or C-hydroxy derivatives of gyrophoric acid (1) has been achieved by using the condensation of an appropriately substituted benzole acid and benzyl lecanorate (33) or benzyl 2-O-methyllecanorate (32) in the key step.