In a list, between commas, or following a comma, a normal ellipsis is used, as in:

  
    
      
        1
        ,
        2
        ,
        3
        ,
        …
        ,
        100
      
    
    {\displaystyle 1,2,3,\ldots ,100}
  or to mean an infinite list, as:

  
    
      
        1
        ,
        2
        ,
        3
        ,
        …
      
    
    {\displaystyle 1,2,3,\ldots }
  To indicate the omission of values in a repeated operation, an ellipsis raised to the center of the line is used between two operation symbols or following the last operation symbol, as in:

  
    
      
        1
        +
        2
        +
        3
        +
        ⋯
        +
        100
      
    
    {\displaystyle 1+2+3+\cdots +100}
  Sometimes, e.g.
It is chemically similar to the anti-cancer drug teniposide, being distinguished only by a methyl group where teniposide has a thienyl. Both these compounds have been developed with the aim of creating less toxic derivatives of podophyllotoxin.The substance is a white to yellow-brown, crystalline powder. It is soluble in organic solvents.It is used in form of its salt etoposide phosphate. History
Etoposide was first synthesized in 1966 and U.S. Food and Drug Administration approval was granted in 1983.The nickname VP-16 likely comes from a compounding of the last name of one of the chemists who performed early work on the drug (von Wartburg) and podophyllotoxin. Another scientist who was integral in the development of podophyllotoxin-based chemotherapeutics was the medical pharmacologist Hartmann F. Stähelin. References
External links
"Etoposide". Drug Information Portal. U.S. National Library of Medicine. "Etoposide phosphate". Drug Information Portal. U.S. National Library of Medicine. "Etoposide". National Cancer Institute. 12 August 2008. "Etoposide". NCI Drug Dictionary. National Cancer Institute.