nauclea: small genus of evergreen tropical shrubs or trees with smooth leathery leaves
asterid dicot genus: genus of more or less advanced dicotyledonous herbs and some trees and shrubs
dexamethasone: a corticosteroid drug (trade names Decadron or Dexamethasone Intensol or Dexone or Hexadrol or Oradexon) used to treat allergies or inflammation