New vitamin E isomers (gamma-tocomonoenol and alpha-tocomonoenol) in seeds, roasted seeds and roasted seed oil from the Slovenian pumpkin variety ‘Slovenska golica’

New insights regarding tocopherols in Arabica and Robusta species coffee beans: RP-UPLC-ESI/MSn and NP-HPLC/FLD study

“…However, despite strenuous effort, those three unknown peaks (compounds) could not be identified. A similar case of unidentified compounds was reported by Butinar et al (2011) in roasted pumpkin seeds; unfortunately, the authors also were unable to identify those compounds. It was suggested that those unknown compounds could be used as excellent markers to track the processing history, as well as the genuineness of pumpkin seed oil.…”

WRINKLED1 and ACYL‐COA:DIACYLGLYCEROL ACYLTRANSFERASE1 regulate tocochromanol metabolism in Arabidopsis

“…S5). The mass spectrum of the compound found in eve1 and eve4 seeds and its chromatographic behavior in NP‐HPLC were both identical to those of γ‐tocomonoenol identified in pumpkin seeds (Butinar et al ., ). This suggests that Arabidopsis eve1 and eve4 seeds probably accumulate γ‐tocomonoenol.…”

“…These data indicate that, in contrast to the fully saturated prenyl side chain of c-tocopherol and to the triunsaturated one of c-tocotrienol, the prenyl side chain of the unknown Arabidopsis tocochromanol probably carries a single unsaturation. We searched the literature for this type of tocochromanol and found that few species accumulate tocomonoenols, a group of tocochromanols with a mono-unsaturated prenyl side chain (Matsumoto et al, 1995;Puah et al, 2007;Fiorentino et al, 2009;Butinar et al, 2011;Kruk et al, 2011;Fig. S5).…”

Novel vitamin E forms in leaves of Kalanchoe daigremontiana and Phaseolus coccineus

“…In addition to these tocochromanols, in some species other, relatively unique vitamin E forms have also been identified, like ␣-tocomonoenol in palm seed oil (Matsumoto et al, 1995) and pumpkin seed oil (Butinar et al, 2011), ␥-tocomonoenol in pumpkin seed oil (Butinar et al, 2011), ␦-tocomonoenol in kiwi * Corresponding author. Tel.…”