CAS Registry Number: 79383-72-5 Open image in new window

Taxonomy: Physicochemical and Pharmacological Properties of Sesquiterpene Esters – The Monocyclic Sesquiterpene Esters – Germacranes – Germacranes – Triesters

Biological sources: Kleinia fulgens Hook. [1]

C₃₀H₄₆O₉: 550.3142

Mp: colorless gum [1]

[α]²⁴ (λ, nm): −31.9° (589), −31.9° (578), −36.2° (546), −62.2° (436) (c 0.91, CHCl₃) [1]

IR (CCl₄): 3560, 1740, 1720, 1650 [1]

MS: 550.314 [M]⁺ (1), 532 (0.5), 451 (2), 450 (1), 432 (1), 348, 85 (16), 83 (100), 57 (55), 55 (53) [1]

¹H NMR (270 MHz, CDCl₃, TMS): 1.27 (3H, s, H-15), 1.29 (3H, s, H-13), 1.29 (3H, s, H-14), 1.70 (1H, m, H-2β), 2.00 (1H, m, H-6β), 2.10 (1H, ddd, J = 6.5; 7; 15, H-2α), 2.42 (1H, ddd, J = 2.5; 14; 14, H-6α), 2.75 (1H, dd, J = 6.5; 5, H-1), 3.09 (1H, br d, J = 14; 3; 3, H-7α), 3.27 (1H, s, OH), 3.90 (1H, br dd, J = 2.5; 2.5, H-5β), 5.08 (1H, s, H-12b), 5.23 (1H, d, J = 3, H-9α), 5.31 (1H, s, H-12a), 5.53 (1H, dd, J = 7; 7, H-3α), 5.58 (1H, br dd, J = 3; 3,...