Abstract
The biosynthetic preparation of an anti-fungal agent assumed to be 4'-fluoropyrrolnitrin from 6-fluorotryptophan by Pseudomonas aureofaciens has been previously reported1, 2). We undertook the determination of the structure by X-ray crystallographic analysis in order to prove the position of the fluorine and to obtain information regarding the relative conformation of the two rings and the effect of substituent crowding in this unusual molecule.
