129503-23-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 129503-23-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,2,9,5,0 and 3 respectively; the second part has 2 digits, 2 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 129503-23:
(8*1)+(7*2)+(6*9)+(5*5)+(4*0)+(3*3)+(2*2)+(1*3)=117
117 % 10 = 7
So 129503-23-7 is a valid CAS Registry Number.
129503-23-7Relevant articles and documents
A novel synthesis of [1]benzothieno[3,2-b][1]benzofuran
Cernovska, Katerina,Nic, Miloslav,Pihera, Pavel,Svoboda, Jiri
, p. 1939 - 1949 (2000)
A new synthesis of the title compound based on the formation of the furan ring in the key step was elaborated. Methyl 2-methoxy[1]benzothieno[3,2-b][1]benzofuran-7-carboxylate (15) was prepared by this methodology as a new type of a core for liquid crystal synthesis.
