Potassium (2-acetylphenyl)trifluoroborate
Potassium trifluoro(phenylsulfonamidomethyl)borate
Potassium (4-tert-butoxycarbonylpiperazin-1-yl)methyltrifluoroborate
Potassium [(tert-butoxycarbonylamino)methyl]trifluoroborate