133201-59-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 133201-59-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,3,2,0 and 1 respectively; the second part has 2 digits, 5 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 133201-59:
(8*1)+(7*3)+(6*3)+(5*2)+(4*0)+(3*1)+(2*5)+(1*9)=79
79 % 10 = 9
So 133201-59-9 is a valid CAS Registry Number.
133201-59-9Relevant articles and documents
Photo-Cycloaddition Reactions of 2-Pyrones
Somekawa, Kenichi,Shimo, Tetsuro,Yoshimura, Hiroyuki,Suishu, Takaaki
, p. 3456 - 3461 (2007/10/02)
Sensitized photoreactions of two 2-pyrones with five unsaturated compounds were investigated.The reactions of 2-pyrones with electron-deficient ethylenes gave cycloadducts (3) and cycloadducts (4) across the C5-C6 double bonds in the 2-pyrones.O
