139389-98-3 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 139389-98-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,9,3,8 and 9 respectively; the second part has 2 digits, 9 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 139389-98:
(8*1)+(7*3)+(6*9)+(5*3)+(4*8)+(3*9)+(2*9)+(1*8)=183
183 % 10 = 3
So 139389-98-3 is a valid CAS Registry Number.
139389-98-3Relevant articles and documents
Microwave-assisted synthesis of benzoxazole-7-carboxylate esters using trifluoroacetic acid and acetic acid
Huxley, Anthony
, p. 2658 - 2660 (2006)
Existing routes to benzoxazole-7-carboxylates are low-yielding. The following letter describes a new methodology for the synthesis of benzoxazole-7-carboxylates in much improved yield using trifluoroacetic acid-acetic acid and microwave irradiation. Georg
