Bb Major 7#11, 1st inversion (D in the bass)
Also written as Bbmaj7#11/D.
Notes, from the bass up
D (bass)E#AEA#
The same notes as Bb Major 7#11 (D, E#, A, E and A#), rearranged so D is the lowest note. Use it to move between chords with smaller jumps across the keyboard.