The four kinds of stereoisomers of perhydrobenzo [c] quinolizine were isolated as picrates of mp 203-205°, mp 182-184°, mp 171°, and mp 155°, whose stereostructures were elucidated as IIIa, IIIb, IIIg, and IIId (or IIIh), though the last one was not determined conclusively due to the minute quantity available.
