“…Collidine hydrochloride was dried prior to use by gentle heating under vacuum. The following compounds were purchased, prepared according to literature procedures, or have already been described in the literature: 1 ,28 2 ,28 3 ,29 7 ,14 8 ,16 9 ,16 10 ,17 13, 15 ,30 16 ,31 18 ,32 19, 21, 23, 25 ,33 26 ,34 28 ,35 31 ,35 33 ,36 36 36…”