piano chord
E♭13
E♭1G3B♭5D♭♭7F9C13
Seven notes in theory and four or five in anyone’s hands: root, third, seventh and thirteenth carry it.
Written the other way round it is D♯13 — the same twelve keys on a piano, a different piece of notation.
What is true of it
E♭13 is E♭, G, B♭, D♭, F and C — 1, 3, 5, b7, 9 and 13 counted from E♭.
On an instrument that cannot reach all 6, the 5, 9 and 1 go first, in that order.