3.3.3. Benzocamphorin G (**3**)

Colorless syrup; IR (KBr) νmax: 2937, 2205, 1667, 1607, 1588, 1450, 1365, 1273, 1230, 1078, 853 cm<sup>−</sup>1; UV (MeOH) λmax: 268, 296 nm; ESI-MS *m*/*z* 239 [M + Na]+; HR-ESI–MS *m*/*z* 239.0686 ([M + Na]+) (Calcd. for C13H12O3Na: 239.0684); 1H-NMR (CDCl3, 400 MHz) δ 5.90 (1H, s, H-2), 5.55 (1H, s, H-4- ), 5.44 (1H, s, H-4), 3.82 (3H, s, OCH3), 2.22 (3H, s, CH3-5), 2.01 (3H, s, CH3-3- ). 13C-NMR (CDCl3, 100 MHz) δ 183.1 (C-1), 181.3 (C-6), 158.8 (C-3), 144.6 (C-5), 129.4 (C-4), 126.2 (C-3- ), 125.1 (C-4- ), 108.7 (C-2- ), 107.0 (C-2), 81.7 (C-1- ), 56.3 (OCH3), 23.0 (CH3-3- ), 14.5 (CH3-5).
