Filixic acid ABA, a natural phloroglucinol derivative extracted from the rhizomes of male ferns (Dryopteris filix-mas), is primarily utilized in natural product chemistry and pharmacological research. Historically, it has been employed in traditional medicine as an anthelmintic to expel tapeworms due to its antiparasitic properties. Modern studies explore its bioactivity for potential development of new antiparasitic agents, though its use is limited by toxicity concerns. It is also of interest in organic synthesis for understanding complex natural compound structures and in botanical research for investigating fern-derived metabolites.