[Haskell-beginners] help me with eroor

import Text.ParserCombinators.Parsec csvFile = endBy line eol line = sepBy cell (char ',') cell = many (noneOf ",\n") eol = char '\n' parseCSV :: String -> Either ParseError [[String]] parseCSV input = parse csvFile "(unknown)" input *showing error: <interactive>:1:32: Not in scope: `main' *