158890-25-6 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 158890-25-6 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,5,8,8,9 and 0 respectively; the second part has 2 digits, 2 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 158890-25:
(8*1)+(7*5)+(6*8)+(5*8)+(4*9)+(3*0)+(2*2)+(1*5)=176
176 % 10 = 6
So 158890-25-6 is a valid CAS Registry Number.
158890-25-6Relevant articles and documents
Synthesis of some 4-oxothiochromenes and related compounds
Liepa, Andris J.,Nguyen, Oanh,Saubern, Simon
, p. 864 - 869 (2007/10/03)
Thiosalicylic acids react with 2-substituted N,N-dialkyl acetamides to give 3-substituted-N,N-dialkyl-2-amino-4-oxothiochromenes 13. N-Alkyl 2-piperidone and analogous caprolactams give derivatives of 1,2,3,4-tetrahydrothiochromeno[2, 3-b]pyridin-5-one 16