This is a Phase 1, double-blind trial in two parts. A single ascending dose study in approximately 3 cohorts receiving a single oral dose of PU-AD or placebo and a multiple ascending dose study in 2 cohorts. Each subject in all cohorts will be administered an oral solution of PU AD or placebo under fasting conditions. Each cohort will contain subjects randomized to active treatment or placebo, evaluating safety and tolerance.
