F Quartal (So What), 1st inversion (Bb in the bass)
Also written as F quartal/Bb.
Notes, from the bass up
Bb (bass)EbGCF
The same notes as F Quartal (So What) (Bb, Eb, G, C and F), rearranged so Bb is the lowest note. Use it to move between chords with smaller jumps across the keyboard.