121980-54-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 121980-54-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,2,1,9,8 and 0 respectively; the second part has 2 digits, 5 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 121980-54:
(8*1)+(7*2)+(6*1)+(5*9)+(4*8)+(3*0)+(2*5)+(1*4)=119
119 % 10 = 9
So 121980-54-9 is a valid CAS Registry Number.
121980-54-9Relevant academic research and scientific papers
ARYL RADICAL-INDUCED CYCLIZATION ROUTES TO FUROBENZOFURANS. ABBREVIATED FORMAL SYNTHESES OF AFLATOXINS B1 AND B2
Sloan, C. P.,Cuevas, J. C.,Quesnelle, C.,Snieckus, V.
, p. 4685 - 4686 (2007/10/02)
Radical-induced cyclization of butenolide ethers 3a-c affords furobenzofurans 4a-c; deprotection of 4c gives 4d, thus concluding formal total syntheses of aflatoxins B1 (5) and B2 (6).
