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