The E flat minor seventh chord is a 4-note chord consisting of the notes Eb, Gb, Bb and Db.
You can see these notes highlighted in the interactive piano chart below.
The chord itself is often abbreviated as Ebm7.
Chords that are a superset of Ebm7. The chords include more notes but always Eb, Gb, Bb and Db.
Chords that are a subset of Ebm7. These contain less notes but all of them are included in Ebm7.
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 Ebm7 chord. Feel free to save or share the image as needed.