MS/MS analysis of the compound isolated by preparative TCL (100 μg/ml extract solution diluted in MS-grade methanol); zoom on m/z 151.0 ± 1.0 with a normalized collision energy of 28%, and the 3 molecular structures attributable to the spectrum: 2-hydro-4-methoxybenzaldehyde (1), isovanillin (2) and vanillin (3).