Eb 13#11, 6th inversion (B# in the bass)
Also written as Eb13#11/B#.
Notes, from the bass up
B# (bass)D#GA#C#E#A
The same notes as Eb 13#11 (B#, D#, G, A#, C#, E# and A), rearranged so B# is the lowest note. Use it to move between chords with smaller jumps across the keyboard.