219700-77-3 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 219700-77-3 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, 7 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 219700-77:
(8*2)+(7*1)+(6*9)+(5*7)+(4*0)+(3*0)+(2*7)+(1*7)=133
133 % 10 = 3
So 219700-77-3 is a valid CAS Registry Number.
219700-77-3Relevant 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.
