Abstract
The glucose ester of phaseic acid has been isolated and characterized from tomato shoots ( Lycopersicon esculentum cv. Grosse Lisse) fed with RS-[2- 14C]ABA and has been shown to occur naturally. The metabolite was isolated by reverse and normal phase HPLC as the tetra-acetyl derivative and identified by a combination of 1H NMR (500 MHz), CIMS and TLC. Evidence for the natural occurrence of the glucose esters of 4′-dihydrophaseic and 4′- epi-dihydrophaseic acid was also obtained.
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