Eb 7sus2, 3rd inversion (C# in the bass)
Also written as Eb7sus2/C#.
Notes, from the bass up
C# (bass)D#E#A#
The same notes as Eb 7sus2 (C#, D#, E# and A#), rearranged so C# is the lowest note. Use it to move between chords with smaller jumps across the keyboard.