Ab 7sus2, 2nd inversion (D# in the bass)
Also written as Ab7sus2/D#.
Notes, from the bass up
D# (bass)F#G#A#
The same notes as Ab 7sus2 (D#, F#, G# and A#), rearranged so D# is the lowest note. Use it to move between chords with smaller jumps across the keyboard.