piano chord
E♭7
E♭1G3B♭5D♭♭7
Major triad, minor seventh. The chord that wants to resolve a fourth up.
Written the other way round it is D♯7 — the same twelve keys on a piano, a different piece of notation.
What is true of it
E♭7 is E♭, G, B♭ and D♭ — 1, 3, 5 and b7 counted from E♭.
On an instrument that cannot reach all 4, the 5 goes first, in that order.