Db Quartal (So What), 3rd inversion (D# in the bass)
Also written as Db quartal/D#.
Notes, from the bass up
D# (bass)G#C#F#B
The same notes as Db Quartal (So What) (D#, G#, C#, F# and B), rearranged so D# is the lowest note. Use it to move between chords with smaller jumps across the keyboard.