The E flat dominant sharp ninth chord is a 5-note chord consisting of the notes Eb, G, Bb, Db and F#.
You can see these notes highlighted in the interactive piano chart below.
The chord itself is often abbreviated as Eb7#9.
Interactive piano diagram for the E flat dominant sharp ninth chord
Chords that are a subset of Eb7#9. These contain less notes but all of them are included in Eb7#9.