piano chord
F♯7sus4
F♯1B4C♯5E♭7
A dominant seventh with the fourth standing in for the third.
Written the other way round it is G♭7sus4 — the same twelve keys on a piano, a different piece of notation.
What is true of it
F♯7sus4 is F♯, B, C♯ and E — 1, 4, 5 and b7 counted from F♯.
On an instrument that cannot reach all 4, the 5 goes first, in that order.