5140-50-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 5140-50-1 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 5,1,4 and 0 respectively; the second part has 2 digits, 5 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 5140-50:
(6*5)+(5*1)+(4*4)+(3*0)+(2*5)+(1*0)=61
61 % 10 = 1
So 5140-50-1 is a valid CAS Registry Number.
InChI:InChI=1/C19H21NO4/c1-20-7-6-11-4-5-15(22-2)19-18(11)13(20)8-12-9-17(23-3)14(21)10-16(12)24-19/h4-5,9-10,13,21H,6-8H2,1-3H3/t13-/m0/s1
5140-50-1Relevant articles and documents
DEMETHYLATIONS IN THE CULARINE SERIES
Lera, Angel Rodriquez de,Villaverde, Carmen,Castedo, Luis
, p. 109 - 113 (2007/10/02)
Selective demethylation in 7,4',5'-substituted cularine compounds can be achieved under two different sets of conditions (acidic and nucleophilic).Less satisfactory results are obtained in the 7,3',4'-substituted analogs.