C Minor 9b5, 1st inversion (Eb in the bass)
Also written as Cm9b5/Eb.
Notes, from the bass up
Eb (bass)GbBbDC
The same notes as C Minor 9b5 (Eb, Gb, Bb, D and C), rearranged so Eb is the lowest note. Use it to move between chords with smaller jumps across the keyboard.