A sharp suspended fourth flat ninth piano chord - A#b9sus
The A sharp suspended fourth flat ninth chord is a 5-note chord consisting of the notes A#, D#, E#, G# and B.
You can see these notes highlighted in the interactive piano chart below.
The chord itself is often abbreviated as A#b9sus.
Interactive piano diagram for the A sharp suspended fourth flat ninth chord
Chords that are a subset of A#b9sus. These contain less notes but all of them are included in A#b9sus.