Ab 13sus4, 2nd inversion (D# in the bass)
Also written as Ab13sus4/D#.
Notes, from the bass up
D# (bass)F#A#E#G#C#
The same notes as Ab 13sus4 (D#, F#, A#, E#, G# and C#), rearranged so D# is the lowest note. Use it to move between chords with smaller jumps across the keyboard.