title: The structure of benulin, a new pentacyclic triterpene hemiketal isolated from Bursera arida (Burseraceae).
mesh_terms: D055598:Chemical Phenomena; D002621:Chemistry; D004852:Epoxy Compounds / Q000302:isolation & purification; D010944:Plants / Q000032:analysis; D014315:Triterpenes / Q000302:isolation & purification*
chemical_list: D004852:Epoxy Compounds; D014315:Triterpenes; C014351:benulin