“…Recrystallization from nitromethane gave a product with mp 71-72°; yield 0.5 g (10%); mass spectrum m/e (% of base peak) 29 (17), 41 (26), 43 (22), 55 (6), 57 (100), 58 (5), 71 (9), 115 (9), 128 (6), 129 (5), 141 (6), 142 (5), 143 (7), 149 (13), 157 (5), 159 (5), 167 (6), 173 (9), 174 (7), 229 (14), 372 (78), 373 (8), 427 (5), 428 (46), 429 (7), 483 (7), 484 (35), 485 (7), 540 (21), 541 (5). The purpose of the synthesis was to obtain a sample of lj large enough to permit nmr measurements, and the reaction conditions were consequently not optimized.…”