142503-07-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 142503-07-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,4,2,5,0 and 3 respectively; the second part has 2 digits, 0 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 142503-07:
(8*1)+(7*4)+(6*2)+(5*5)+(4*0)+(3*3)+(2*0)+(1*7)=89
89 % 10 = 9
So 142503-07-9 is a valid CAS Registry Number.
142503-07-9Relevant articles and documents
Furopyridines. XXXI [1]. Birch reduction of furopyridines
Yamaguchi, Seiji,Hamade, Eriko,Yokoyama, Hajime,Hirai, Yoshiro,Shiotani, Shunsaku
, p. 335 - 339 (2007/10/03)
Birch reduction of four furopyridines 1a-d effected the characteristic cleavage of the furan ring, giving ethnylpyridinols 2a-d, vinylpyridinols 3b,d, and ethylpyridinols 4a-d, and the reduction of the furan ring, giving dihydrofuropyridine 5c,d.
