D# Minor Major 9th, 1st inversion (F# in the bass)
Also written as D#m(maj9)/F#.
Notes, from the bass up
F# (bass)A#DE#D#
The same notes as D# Minor Major 9th (F#, A#, D, E# and D#), rearranged so F# is the lowest note. Use it to move between chords with smaller jumps across the keyboard.