F Minor 9b5, 2nd inversion (Cb in the bass)
Also written as Fm9b5/Cb.
Notes, from the bass up
Cb (bass)EbGFAb
The same notes as F Minor 9b5 (Cb, Eb, G, F and Ab), rearranged so Cb is the lowest note. Use it to move between chords with smaller jumps across the keyboard.