Direct injection of the isolated compound in ESI-MS (negative
ion mode) yielded a major peak at m/z 151.01 and its chloride
adduct [M+Cl] at m/z 187.11. This peak could correspond to
2-hydroxy-4-methoxybenzaldehyde (2H4MBZA), to 3-hydroxy-4-
methoxybenzaldehyde (isovanillin) or to 4-hydroxy-3-methoxybenzaldehyde
(vanillin); these 3 molecules of Mr 152.15 have been
previously described in M. whitei (Kubo and Kinst-Hori, 1999;
Mukonyi and Ndiege, 2001; Watcho et al., 2006). MS/MS
fragmentation (Fig. 2) yielded peaks characteristic of these 3
isomers: m/z 135.85, [MCH3H]; m/z 122.95, [MCHO] and
m/z 107.89 for [MCH3CHO].
Direct injection of the isolated compound in ESI-MS (negativeion mode) yielded a major peak at m/z 151.01 and its chlorideadduct [M+Cl] at m/z 187.11. This peak could correspond to2-hydroxy-4-methoxybenzaldehyde (2H4MBZA), to 3-hydroxy-4-methoxybenzaldehyde (isovanillin) or to 4-hydroxy-3-methoxybenzaldehyde(vanillin); these 3 molecules of Mr 152.15 have beenpreviously described in M. whitei (Kubo and Kinst-Hori, 1999;Mukonyi and Ndiege, 2001; Watcho et al., 2006). MS/MSfragmentation (Fig. 2) yielded peaks characteristic of these 3isomers: m/z 135.85, [MCH3H]; m/z 122.95, [MCHO] andm/z 107.89 for [MCH3CHO].
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