5 notes · the ♭3 and ♭7 · 5th mode of E♭ major pentatonic
Natural minor without the 2nd and ♭6.
the ♭3 and ♭7
Every other note here is not a third apart, so it builds no chords. Play it over the ones below.
Chords on C made only of these notes.
Shows each chord the way this style would voice it, and marks which of its alternatives belong to the idiom.