Eb Major 9#11, 2nd inversion (A# in the bass)
Also written as Ebmaj9#11/A#.
Notes, from the bass up
A# (bass)DE#AD#G
The same notes as Eb Major 9#11 (A#, D, E#, A, D# and G), rearranged so A# is the lowest note. Use it to move between chords with smaller jumps across the keyboard.