piano chord
D♭7sus4
D♭1G♭4A♭5C♭♭7
A dominant seventh with the fourth standing in for the third.
Written the other way round it is C♯7sus4 — the same twelve keys on a piano, a different piece of notation.
What is true of it
D♭7sus4 is D♭, G♭, A♭ and C♭ — 1, 4, 5 and b7 counted from D♭.
On an instrument that cannot reach all 4, the 5 goes first, in that order.