An endogenous retinoic acid receptor (RAR) agonist that upregulates forkhead box class O (FoxO) transcription factor. Suppresses activity and proliferation of sebaceous glands. Used for treating nodulocystic acne. Induces differentiation, neurite outgrowth and inhibits proliferation of neuroblastoma cells. A potential chemopreventive agent in non-small cell lung cancer, head and neck squamous cell carcinoma and neuroblastoma.