“…, (24), and (25), and 205 "C for compound (21)] of a smaller scale irradiation under the above conditions showed that after 15 min (and 30 min) compounds (20), (21), ( 22), (24), and (25) were present in yields of 46 (2), 9 (1 l), 7 (1 l), 4 (7), and 33% (60%) respectively.…”