sentences:  In the frame of that same investigation, Robiquet in addition evidences the presence of uric acid within insects feeding on plant tissues.Over a period of some fifteen years, Pierre Robiquet will also conduct a series of investigations on bitter almonds oil, a complex substance obtained from Prunus dulcis.In 1816, together with Jean-Jacques Colin, they obtain a new component which they call "éther hydrochlorique", (1,2-Dichloroethane), which they will try to promote as a reinvigorating medicine.