Notes used in D♭ minor Dominant 9 Chord:
D♭ + F♭ + A♭ + C♭ + E♭
minor Dominant 9 chords are played combining a root, minor (♭) third, perfect fifth, minor (♭) seventh, and nineth notes of the root note's major scale.
minor Dominant 9 Chord Formula:
1 + 3♭ + 5 + 7♭ + 9