135580-19-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 135580-19-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,5,5,8 and 0 respectively; the second part has 2 digits, 1 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 135580-19:
(8*1)+(7*3)+(6*5)+(5*5)+(4*8)+(3*0)+(2*1)+(1*9)=127
127 % 10 = 7
So 135580-19-7 is a valid CAS Registry Number.
135580-19-7Relevant academic research and scientific papers
A convenient preparation of 8-ethyl-4,9-dihydro-3H-pyrano[3,4-b]indole-1-one, key intermediate of the antiinflammatory agent Etodolac
Gonzalez
, p. 669 - 674 (2007/10/02)
A facile synthesis of 8-ethyl-4,9-dihydro-3H-pyrano[3,4-b]indole-1-one 5 is described which features the condensation of hydrazines with 2-oxo-5-hydroxypentanoic acid, followed by Fischer cyclization of these adducts.
