Reactant used for preparation of furospinosulin-1 and analogs as hypoxia-selective antitumor agents, Aminoquinolines as beta-site amyloid precursor protein cleaving enzyme 1 (BACE1) inhibitors and potential anti-Alzheimer?s drugs, phenylpropanoic acid peroxisome proliferator-activated receptor (PPAR) α-selective agonists as nonalcoholic steatohepatitis (NASH)-preventive agents, PPAR agonists with phenethylphenylphthalimide skeleton derived from thalidomide-related LXR antagonists, notch-sparing γ-secretase inhibitors derived from PPAR agonist library and plakotenin via Diels-Alder reaction, as a potential anticancer agent, naturally found in Okinawan sponge of the genus Plakortis.