D# Minor 9b5, 4th inversion (E# in the bass)
Also written as D#m9b5/E#.
Notes, from the bass up
E# (bass)D#F#AC#
The same notes as D# Minor 9b5 (E#, D#, F#, A and C#), rearranged so E# is the lowest note. Use it to move between chords with smaller jumps across the keyboard.