D# Minor 13th, 3rd inversion (C# in the bass)
Notes, from the bass up
C# (bass)E#G#B#D#F#A#
The same notes as D# Minor 13th (C#, E#, G#, B#, D#, F# and A#), rearranged so C# is the lowest note. Use it to move between chords with smaller jumps across the keyboard.