133591-12-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 133591-12-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,3,5,9 and 1 respectively; the second part has 2 digits, 1 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 133591-12:
(8*1)+(7*3)+(6*3)+(5*5)+(4*9)+(3*1)+(2*1)+(1*2)=115
115 % 10 = 5
So 133591-12-5 is a valid CAS Registry Number.
133591-12-5Relevant academic research and scientific papers
New Synthesis of Catalpalactone
Chordia, Mahendra D.,Narasimhan, Nurani S.
, p. 371 - 376 (2007/10/02)
Various alkylidenephthalides (E- and Z-5, 6 and 7) were prepared by Wittig reaction of phosphoranes 4a, 4b and 4c respectively with phthalic anhydride.The products were then lactonised, using chloro(trimethyl)silane and sodium iodide, to the corresponding
