Eb 13b9, 2nd inversion (A# in the bass)
Also written as Eb13b9/A#.
Notes, from the bass up
A# (bass)C#EB#D#G
The same notes as Eb 13b9 (A#, C#, E, B#, D# and G), rearranged so A# is the lowest note. Use it to move between chords with smaller jumps across the keyboard.