F# 13#11, 6th inversion (D# in the bass)
Also written as F#13#11/D#.
Notes, from the bass up
D# (bass)F#A#C#EG#B#
The same notes as F# 13#11 (D#, F#, A#, C#, E, G# and B#), rearranged so D# is the lowest note. Use it to move between chords with smaller jumps across the keyboard.