139728-25-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 139728-25-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,9,7,2 and 8 respectively; the second part has 2 digits, 2 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 139728-25:
(8*1)+(7*3)+(6*9)+(5*7)+(4*2)+(3*8)+(2*2)+(1*5)=159
159 % 10 = 9
So 139728-25-9 is a valid CAS Registry Number.
139728-25-9Relevant 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.
