Eb Quartal (So What), 4th inversion (A# in the bass)
Also written as Eb quartal/A#.
Notes, from the bass up
A# (bass)D#G#C#E#
The same notes as Eb Quartal (So What) (A#, D#, G#, C# and E#), rearranged so A# is the lowest note. Use it to move between chords with smaller jumps across the keyboard.