A Dominant 9th, 4th inversion (B in the bass)

BAEGC#
4 4
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Notes, from the bass up

B (bass)AC#EG

The same notes as A Dominant 9th (B, A, C#, E and G), rearranged so B is the lowest note. Use it to move between chords with smaller jumps across the keyboard.

See the full A Dominant 9th page for root position, every other inversion, open voicings and the chord formula.