C natural minor scale
(or Aeolian mode scale)

Listen

C minor notes: C D Eb F G Ab Bb

3-notes chords built on C minor scale:

1. C Minor: C Eb G
2. D Diminished: D F Ab
3. Eb Major: Eb G Bb
4. F Minor: F Ab C
5. G Minor: G Bb D
6. Ab Major: Ab C Eb
7. Bb Major: Bb D F

4-notes chords built on C minor scale:

1. C Minor 7: C Eb G Bb
2. D Half Diminished 7: D F Ab C
3. Eb Major 7: Eb G Bb D
4. F Minor 7: F Ab C Eb
5. G Minor 7: G Bb D F
6. Ab Major 7: Ab C Eb G
7. Bb Dominant 7: Bb D F Ab