121899-22-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 121899-22-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,2,1,8,9 and 9 respectively; the second part has 2 digits, 2 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 121899-22:
(8*1)+(7*2)+(6*1)+(5*8)+(4*9)+(3*9)+(2*2)+(1*2)=137
137 % 10 = 7
So 121899-22-7 is a valid CAS Registry Number.
121899-22-7Relevant articles and documents
Tetraacetylethylene adn Nitrile Oxides: Synthesis of Spirofuranisoxazoles
Adembri, G.,Di Tommaso, A.,Lampariello, L. R.,Scotton, M.
, p. 1621 - 1625 (2007/10/02)
trans and cis-3-Hexen-2,5-dione, 2, reacted with nitrile oxides to give 4,5-dihydroisoxazoles 3a-c with the trans configuration.On the contrary the reaction between 3,4-diacetyl-3-hexen-2,5-dione, 1, with nitrile oxides yielded 3-aryl-8,9-diacetyl-7-hydro
