Furan is a five-membered heterocycle with an oxygen as heteroatom. In medicine, furan derivatives are used as antibacterial agents (Nitrofurazone, Nitrofurantoin, Furazolidone, Furosemide). Which substituent is in the 5th position of the furan cycle in Nitrofurazone (Furacilinum) , Nitrofurantoin and Furazolidone ?


A) nitro group
> furazolidon
> nitro furazon (furacilinom)

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