Synthesis and molecular structure of 4-nitro-9-phenyl-2,3-dihydro-1H-and 9-hydroxy-3-oxo-9-phenyl-2,3-dihydro-9H-indeno[2,1-c]pyridines and 3,7-diphenyl-3a,4,5,6-tetrahydroindeno[2,1-c]isoxazolo[5,4-d]pyridine