“…At room temperature compound 58 also decomposes very quickly to salt 28 in (CD 3 ) 2 SO solutions used for NMR; CDCl (42), 118 (16), 104 (24) and 91 (32). 5), 232 (6), 220 (100), 206 (11), 192 (100), 178 (8), 160 (26), 146 (65), 131 (45), 118 (14), 104 (22) and 91 (16). (7), 146 (32), 131 (12), 117 (21), 104 (12) and 91 (10).…”