“…mp. 33-36 °C; IR (neat) ν max : 3400-2500 (−CO 2 H), 3084 (=C-H), 3063 (=C-H), 3028 (=C-H), 2927, 2915, 2848, 1694 (C=O), 1604, 1495, 1462, 1454, 1433, 1412, 1320, 1264, 1207, 1198, 1026, 930, 904, 745, 727, 2, 140 (53), 117 (17), 104 (29), 91 (100), 80 (39), 67 (14), 55 (12). UPLC-HRMS (negative ion mode) Calcd for C 22 (1), 171(2), 154 (42), 131 (16), 117 17, 104 (33), 91 (100), 79 28, 74 24, 67 (18), 55 (12).…”