Of course you do a trial, a clinical trial that does not require a Phase 2 like you said. Your statements are wrong.
Besides there have already been animal studies with the oral version.
Water Maze Studies Mouse strain B6C3-Tg carrying mutant Swedish Amyloid precursor protein (sweAPP) and PS1 (presenilin-1) genes associated with early onset Alzheimer's disease were subjected to water maze tests at 5-6 months of age. These tests suggest that mice that received Bryostatin-1 at a dose of 5 micrograms/mouse on alternative days orally in an oil formulation showed significant protection against Alzheimer's disease mediated memory loss produced by the APP/PS1 mutations as compared with memory acquisition skills seen in control animal