Notes used in C♯ Dominant 7 Third Inversion Chord:
B + C♯ + E♯ + G♯
Dominant 7 chords are played combining a root, major third, perfect fifth, and minor (♭) seventh notes of the root note's major scale.
Dominant 7 Third Inversion Chord Formula:
7♭ + 1 + 3 + 5