sentences:  He also obtained an oily fraction (0.8%), small quantities of a matter with properties of a gum, albuminic substances, tannins, starch, a yellowish dye, a fraction with bitter taste, and, as from asparagi, a fraction that can be crystallized and seemingly close to asparagin, which it will be indeed proven to be in 1828 by Plisson.Robiquet likewise analysed a variety of animal tissues.Thus in 1810, he isolated from "Lytta vesicatoria", an insect, a molecule that he calls cantharidin, which he proves is the cause of the severe irritations and blisters provoked by that insect, and is present in a variety of unrelated species that use the molecule as a protection of their eggs from predation [1] (Two families of insects belonging to the order of Coleoptera synthetise that molecule