Colocynth and elaterium have also been proved to act specifically.
elaterium, a substance obtained from the fruit of the squirting or wild cucumber (Ecballium agreste).
Its medicinal action is similar to that of elaterium, differing only in its greater activity.
It forms colourless scales which have a bitter taste, but it is highly inadvisable to taste either this substance or elaterium.
Elaterin is extracted from elaterium by chloroform and then precipitated by ether.