F# 13sus4, 5th inversion (D# in the bass)
Also written as F#13sus4/D#.
Notes, from the bass up
D# (bass)F#BC#EG#
The same notes as F# 13sus4 (D#, F#, B, C#, E and G#), rearranged so D# is the lowest note. Use it to move between chords with smaller jumps across the keyboard.