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Article PREPARATION OF BICYCLIC GUANIDINES BY THE IODOCYCLIZATION OF 3-ALKENYL-2-(SUBSTITUTED AMINO)- 1-IMIDAZOLIN-4-ONES1 was published on August 1, 1996 in the journal Heterocyclic Communications (volume 2, issue 4).
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Noguchi et al. (1996) studied this question.
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