E#9 chord

The E-sharp dominant ninth chord (abbreviated E#9 chord) is a five-note chord consisting of the notes E♯, G, B♯, D♯, and F. The chord is formed by adding a major ninth to the E-sharp dominant seventh chord.

In practice, the fifth (B♯) is sometimes omitted from the E#9 chord because it's not always possible to play all notes simultaneously.