Mass spectra of aniline glucuronides

Mass spectra of TMS derivatives of aniline glucuronide and pentachloroaniline glucuronide are presented, and the fragmentation of these derivatives is compared with that of TMS aryl-O-glucuronides. Fragmentation yielding ions entirely from the glycone moiety was sufficiently similar to establish these N-glucuronides as TMS glucuronides in the same manner used for TMS-O-glucuronides; however, differences observed may be diagnostic for TMS-N-glucuronides.