F# Minor 9b5, 2nd inversion (C in the bass)
Also written as F#m9b5/C.
Notes, from the bass up
C (bass)EG#F#A
The same notes as F# Minor 9b5 (C, E, G#, F# and A), rearranged so C is the lowest note. Use it to move between chords with smaller jumps across the keyboard.