Journal of Medicinal Chemistry, 1975, Vol. 18, No. 8 857
Notes solid was filtered, washed with EtOAc-Me2CO (9:1), and dried to give 64.4 g (38%)of 9: mp 151-156.5'. Recrystallization from methyl isobutyl ketone gave 55.7 g (33%) of essentially pure 9, mp 159.5-161'; rods from i-PrOH, mp 160-
