137833-36-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 137833-36-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,7,8,3 and 3 respectively; the second part has 2 digits, 3 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 137833-36:
(8*1)+(7*3)+(6*7)+(5*8)+(4*3)+(3*3)+(2*3)+(1*6)=144
144 % 10 = 4
So 137833-36-4 is a valid CAS Registry Number.
InChI:InChI=1/C13H14O4/c1-8(14)12(9(2)15)13(16)10-4-6-11(17-3)7-5-10/h4-7,12H,1-3H3
137833-36-4Relevant articles and documents
Photo-isomerisations reversibles d'enols dans la serie des triacylmethanes
Couchouron, Benoit,Saint, Jacques Le,Courtot, Pierre
, p. 381 - 384 (2007/10/02)
Interconversions between chelated enolic configurational isomers E and Z take place when equilibrated solutions of enolised triacylmethanes ArCO(RCO)CHCOR' are irradiated.It is concluded that isomerization takes place directly by rotation around the olefinic double bond of the enolic ring after cleavage of the intramolecular hydrogen bond.
