The dominant 7♯11 or Lydian dominant (C7♯11) comprises the notes: r, 3, (5), ♭7, (9), ♯11, (13) (Note that in jazz lead sheet notation, upper extensions (intervals beyond the 7th) aren't named unless they are altered; alternatively, when including the 9th and 13th this chord could be called a C13♯11.)