title: Toxic effects of certain pentacyclic triterpenoids on early embryogenesis of the sea urchin.
mesh_terms: D000818:Animals; D005260:Female; D006027:Glycosides / Q000633:toxicity; D010063:Ovum / Q000187:drug effects / Q000254:growth & development*; D011083:Polycyclic Compounds / Q000633:toxicity*; D012617:Sea Urchins / Q000187:drug effects / Q000254:growth & development; D014315:Triterpenes / Q000633:toxicity*
chemical_list: D006027:Glycosides; D011083:Polycyclic Compounds; D014315:Triterpenes