Table 2 APCI–LC-MS/MS analysis of GTK
Sl no. | m/z | MS/MS | Tentative identification | Type of compound | Molecular formula | Ionization mode |
|---|---|---|---|---|---|---|
1 | 193.0566 | 133.03 | 7-Hydroxy-6-methoxy coumarin | Coumarin | C10H8O4 | Positive |
2 | 177.1412 | 77.23 | 4-Methylumbelliferone | Coumarin | C10H8O3 | Positive |
3 | 217.0593 | 202.02 | 5-Methoxy-6,7-furanocoumarin | Coumarin | C12H8O4 | Positive |
4 | 163.0441 | 107.05 | 7-Hydroxycoumarin | Coumarin | C9H6O3 | Positive |
5 | 219.2102 | 115.24 | 8-Acetyl-7-methoxycoumarin | Coumarin | C12H10O4 | Positive |
6 | 163.0396 | 144.12 | p-coumaric acid | Phenolics | C9H8O3 | Negative |
7 | 187.210 | 167.08 | Azelaic acid | Carboxylic acid | C9H16O4 | Negative |
8 | 299.253 | 179.16 | Diosmetin | Flavonoid | C16H12O6 | Negative |
9 | 455.3528 | 438.20 | Betulinic acid | Phenolics | C30H48O3 | Negative |
10 | 431.0918 | 270.25 | Apigenin 7-O-glucoside | Flavonoid | C21H20O10 | Negative |