cinchonine [ LA 40221,LA-40221,cinchonine, hexaiodoTl(-2) (1:1), (9S)-isomer,cinchonine, hydrochloride, (9S)-isomer,cinchonine, monohydrochloride, (9S)-isomer,cinchonine, sulfate (2:1), (9S)-isomer ] diastereoisomer of cinchonidine with distinct physiochemical properties; occurs in most varieties of cinchona bark; RN given refers to parent cpd(9S)-isomer