Complex sentence: The name "ichthyothere" literally translates as "fish poison"--the active constituent ichthyothereol is a polyacetylene compound so toxic to fish that they will jump out of the water if "Ichthyothere terminalis" leaves are used as bait.
Split into simpler sentences: The name "ichthyothere" literally translates as "fish poison". This plant's active constituent is a chemical called ichthyothereol, which is a polyacetylene compound so toxic to fish that they will jump out of the water if "Ichthyothere terminalis" leaves are used as bait.