cincholoipon

\\ˌsiŋkəˈlȯiˌpän, ˌsin-\ noun (-s)

Etymology: International Scientific Vocabulary cinchonine + Greek loipon-, loipos remainder, from leipein to leave — more at loan

: a yellow crystalline acid C₅H₉N(C₂H₅)CH₂COOH obtained especially by oxidation of cinchonine