The D sharp minor/major ninth chord is a 5-note chord consisting of the notes D#, F#, A#, C## and E#.
You can see these notes highlighted in the interactive piano chart below.
The chord itself is often abbreviated as D#mM9.
Chords that are a subset of D#mM9. These contain less notes but all of them are included in D#mM9.
In case you prefer a non-interactive variant of the chord chart, we've embedded a PNG image below that shows the notes for the the D#mM9 chord. Feel free to save or share the image as needed.