189011-84-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 189011-84-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,8,9,0,1 and 1 respectively; the second part has 2 digits, 8 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 189011-84:
(8*1)+(7*8)+(6*9)+(5*0)+(4*1)+(3*1)+(2*8)+(1*4)=145
145 % 10 = 5
So 189011-84-5 is a valid CAS Registry Number.
189011-84-5Relevant articles and documents
Short synthetic route to retinoids through dialkylation of 3-methyl-3-sulfolene
Subramanian,Padmakumar,Bhat, Sujata V.
, p. 2585 - 2586 (1997)
The C20-retinoid carbon skeleton has been synthesised through sequential alkylations of 3-methyl-3-sulfolene with bromomethyl methyl ether followed by C14-aldehyde to give dialkyl sulfolene which on further desulfonylation and dehydration yielded retinol methyl ether.