Abstract
The “normalizing factor” for the tomato mutant “ chloronerva” was shown to possess the structure of (2 S:3' S':3'' S)-N- [N-(3-amino-3-carboxypropyl)-3-amino-3-carboxypropyl]-azetidine-2-carboxylic acid ( 1) and proved to be identical with nicolianamine, especially on the basis of high resolution mass, 1H, and 13CNMR spectroscopie investigations of 1 as well as of its tetra-(trimethylsilyl), di-(4-bromobenzoyl) (trimethyl ester ( 3), 4-bromobenzoyl dimethyl ester, and diacetyl methyl ester ( 4) derivatives. 1 seems to be of general occurrence in higher plants and is considered a possible phytosiderophore with an essential function in the cellular iron transport and/or metabolism.
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