C9+♯2+♭2
C dominant ninth, add sharp second, add flat second

Choose audio sample set:
MSK 007 Leapfrog VCF
(patch;
see
in online store)
MSK 009 Coiler VCF
(patch;
see
in online store)
Equivalent chord symbols: C9+♯1+♯2, C9+♯1+♯9, B♯9+♯1+♯2, B♯9+♯1+♯9, B♯9+♯2+♭2, E♭9♭9+6+♯7.
Notes in this chord: C, D♭, D♯, E, G, B♭, D. Integer notation: {0, 1, 2, 3, 4, 7, 10}.
Nearby chords (one less note): C9+♯1, C9+♯2, Cm9+♯1, E♭9♭9+6, E♭9♭9+♯7, C+2+♯1+♯2, B♭dim+2+4+♯3.
Nearby chords (one more note): B♭13♭5+♯2, C11+♯1+♯2, B♭M13♭5+♯2, C9+♯1+♯2+♯7, G♭13♯11♭9+♯5.
Parallel chords (same structure, different root): D9+♯2+♭2, E9+♯2+♭2, F9+♯2+♭2, G9+♯2+♭2, A9+♯2+♭2, B9+♯2+♭2, C♭9+♯2+♭2, D♭9+♯2+♭2, E♭9+♯2+♭2, F♭9+♯2+♭2, G♭9+♯2+♭2, A♭9+♯2+♭2, B♭9+♯2+♭2, C♯9+♯2+♭2, D♯9+♯2+♭2, E♯9+♯2+♭2, F♯9+♯2+♭2, G♯9+♯2+♭2, A♯9+♯2+♭2, B♯9+♯2+♭2.
This chord contains too many notes to play on the 6 strings of guitar standard EADGBE tuning (change tuning or instrument).