Table 2.

Direct-injection ESI-MS/MS data for catharanthine, vindoline and vinblastine obtained by a Perkin-Elmer Sciex API 300 triple quadrupole instrument equipped with an ESI ion source.

Alkaloid	Precursor ion [M+H]+ m/z	Major ions in MS/MS spectra of standard compounds	Major ions in MS/MS spectra of the compounds in reaction mixture
Catharanthine	337	337, 173, 144	337, 320, 308, 293, 173, 144
Vindoline	457	457, 439, 397, 188	457, 439, 397, 188
Vinblastine	811	811, 793, 751, 733, 649, 542, 355, 337	811, 793, 751, 733, 680, 649, 542, 355, 337