Croton: A plant genus of the family EUPHORBIACEAE. The common name of dragon's blood is also used for DRACAENA and Daemonorops (ARECACEAE). Croton tiglium is the source of CROTON OIL.Croton Oil: Viscous, nauseating oil obtained from the shrub Croton tiglium (Euphorbaceae). It is a vesicant and skin irritant used as pharmacologic standard for skin inflammation and allergy and causes skin cancer. It was formerly used as an emetic and cathartic with frequent mortality.Plant Extracts: Concentrated pharmaceutical preparations of plants obtained by removing active constituents with a suitable solvent, which is evaporated away, and adjusting the residue to a prescribed standard.Euphorbiaceae: The spurge family of flowering plants, in the order Euphorbiales, contains some 7,500 species in 275 genera. The family consists of annual and perennial herbs and woody shrubs or trees.PicratesArdisia: A plant genus of the family MYRSINACEAE. Members contain ardisiacrispins (oleanane triterpenoid saponins), ardicrenin, and cyclamiretin.Diterpenes, Kaurane: A group of DITERPENES cyclized into four rings.Phytotherapy: Use of plants or herbs to treat diseases or to alleviate pain.Angelica: A plant genus of the family Apiaceae.Dermatitis, Irritant: A non-allergic contact dermatitis caused by prolonged exposure to irritants and not explained by delayed hypersensitivity mechanisms.