Also E♭ Major (Ionian), F Dorian
C Natural minor (Aeolian): C D E♭ F G A♭ B♭. Formula 1 2 ♭3 4 5 ♭6 ♭7. Same notes as E♭ Major (Ionian), F Dorian, G Phrygian. The natural minor scale: sad and serious, the basis of minor keys in rock, pop and classical music.