134297-77-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 134297-77-1 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,4,2,9 and 7 respectively; the second part has 2 digits, 7 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 134297-77:
(8*1)+(7*3)+(6*4)+(5*2)+(4*9)+(3*7)+(2*7)+(1*7)=141
141 % 10 = 1
So 134297-77-1 is a valid CAS Registry Number.
134297-77-1Relevant articles and documents
Preparation of a New Series, the 3-Ureidomethylenecoumarins by Condensation of 4-Hydroxycoumarin with Substituted Ureas
Sakellariou, R.,Speziale, V.,Hamdi, M.
, p. 3443 - 3451 (2007/10/02)
We report the synthesis in high yield of a series of 3-ureidomethylenecoumarins by condensation of substituted ureas with 4-hydroxycoumarin in the presence of ethyl orthoformate.
