Db13 chord

The D-flat dominant thirteenth chord (abbreviated Db13 chord) is a seven-note chord consisting of the notes D♭, F, A♭, C♭, E♭, G♭, and B♭. The chord is formed by adding a thirteenth to the D-flat dominant eleventh chord.

In practice, the fifth (A♭) and eleventh (G♭) are often omitted from the Db13 chord to avoid a very dissonant sound, and because it's not always possible to play all notes simultaneously.