133909-18-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 133909-18-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,3,9,0 and 9 respectively; the second part has 2 digits, 1 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 133909-18:
(8*1)+(7*3)+(6*3)+(5*9)+(4*0)+(3*9)+(2*1)+(1*8)=129
129 % 10 = 9
So 133909-18-9 is a valid CAS Registry Number.
133909-18-9Relevant academic research and scientific papers
Synthesis of (+/-)-14-Deoxystypoldione, an Analogue of the Marine Natural Product Stypoldione
Mori, Kenji,Koga, Yasuo
, p. 769 - 774 (2007/10/02)
(+/-)-14-Deoxystypoldione (2) has been synthesized by starting from geranylacetone.The key step was the construction of the spirobenzofuran moiety by an intramolecular Michael addition (15b -> 16). (-)-Stypoldione is the ichthyotoxic and cytotoxic metabol
