If it can be anticipated, based on information from preliminary studies, that a test at one dose level,
equivalent to at least 1000 mg/kg body weight/day, using the procedures described for this study, is
unlikely to produce adverse effects and if toxicity would not be expected based upon data from
structurally related substances, then a full study using three dose levels may not be considered
necessary. The limit of 1000 mg/kg body weight/day applies ex