213686-31-8 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 213686-31-8 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,1,3,6,8 and 6 respectively; the second part has 2 digits, 3 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 213686-31:
(8*2)+(7*1)+(6*3)+(5*6)+(4*8)+(3*6)+(2*3)+(1*1)=128
128 % 10 = 8
So 213686-31-8 is a valid CAS Registry Number.
213686-31-8Relevant academic research and scientific papers
Synthesis of C-2 unsubstituted furanonaphthoquinones
Starling, Sergia M.,Raslan, Delio S.,De Oliveira, Alaide B.,Zani
, p. 3567 - 3578 (2007/10/03)
Four C-2 unsubstituted naphtho[2,3-b]furan-4,9-quinones were prepared via the corresponding phthalides obtained by directed ortho-metalation-based route.
