151021-19-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 151021-19-1 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,5,1,0,2 and 1 respectively; the second part has 2 digits, 1 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 151021-19:
(8*1)+(7*5)+(6*1)+(5*0)+(4*2)+(3*1)+(2*1)+(1*9)=71
71 % 10 = 1
So 151021-19-1 is a valid CAS Registry Number.
151021-19-1Relevant articles and documents
SYNTHESIS OF PYRAZINODINAPHTHYRIDINE AND PYRAZINONAPHTHYRIDINES
Ojea, Vicente,Quintela, Jose M.
, p. 1337 - 1349 (2007/10/02)
A swries of 3-alkyl-, 3-aryl-, and 3-hetarylhexahydro-1H-pyrazinonaphthyridines (4) were prepared from 2-(4-substituted-1-piperazinyl)-3-fromylpyridines (2) by condensation with malononitrile and subsequent thermal cyclization.Octahydro1,2-a: