. 2019 Jul 2;24(13):2429. doi: 10.3390/molecules24132429

Table 7.

Htyr and Tyr derivatives evaluated in negative ionization mode setting the mass range to m/z 90–600.

Theoretical m/z	Ion Elemental Formula	Compound
153.0552	[C₈H₉O₃]⁻	Htyr
377.1242	[C₁₉H₂₁O₈]⁻	Oleuropein aglycone isomers
319.1187	[C₁₇H₁₉O₆]⁻	Decarboxymethyl oleuropein aglycone
393.1191	[C₁₉H₂₁O₉]⁻	Oxygenated oleuropein aglycone isomers
335.1136	[C₁₇H₁₉O₇]⁻	Oxygenated decarboxymethyl oleuropein aglycone
361.1293	[C₁₉H₂₁O₇]⁻	Ligstroside aglycone isomers
303.1238	[C₁₇H₁₉O₅]⁻	Decarboxymethyl ligstroside aglycone
319.1187	[C₁₇H₁₉O₆]⁻	Oxygenated decarboxymethyl ligstroside aglycone

Tyr was not detected.