C,, H,, ClFN, O aAnalyses for C, H, N within 0.4% of theoretical values unless specified. bRecrystallized from MeOH-EtOAc. CAnalysis for C, H only. dCis compound. eRecrystallized from CH, Cl,-EtOAc. fAnalysis for C, H, C1. gAnal. Calcd: C, 70.84; H, 7.50. Found: C, 71.32; H, 8.09.* Satisfactory analysis could not be obtained; ir and nmr in agreement with structures.