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. 2017 Mar 29;409(15):3807–3820. doi: 10.1007/s00216-017-0325-7

Table 2.

Summary of LDI-TOF MS and MS/MS data from methanol extracts of studied compartments. (x, present; −, absent)

Tentative assignment Molecular formula Negative ion mode Positive ion mode
Detected ion (m/z) Grass Chewed grass Grasshoppers Excrements Soil (control) Soil with grasshoppers Detected ion (m/z) Grass Chewed grass Grasshoppers Excrements Soil (control) Soil with grasshoppers
Dehydroquinic acid C7H10O6 [M−H]189 [M+Na]+213 x x x x x x
Quinic acid C7H12O6 [M−H]191 x x [M+Na]+215 x x x x
Apigenin C15H10O5 [M−H]269 x x x x [M+H]+271 x x
Luteolin C15H10O6 [M−H]285 x x x x [M+Na]+309 x x x x x x
Tricin C17H14O7 [M−H]329 x x [M+H]+331 x x
Rosmarinic acid C18H16O8 [M−H]359 x x [M+Na]+383 x x