A#m11 chord

The A-sharp minor eleventh chord (abbreviated A#m11 chord) is a six-note chord consisting of the notes A♯, C♯, E♯, G♯, B♯, and D♯. The chord is formed by adding an eleventh to the A-sharp minor ninth chord.

In practice, the fifth (E♯) is often omitted from the A#m11 chord to avoid a very dissonant sound, and because it's not always possible to play all notes simultaneously.