CAS Registry Number: 56581-77-2 Open image in new window

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

Biological sources: Ferula korshinskyi Korov. [1]; F. leucographa Korov. [2]

C₂₂H₃₄O₅: 378.2406

[n]_D²⁴ 1.491 [1]

[α]_D²³ −29° (c 0.94, CHCl₃) [1]

UV: 222 (3.94) [1]

IR: 2960–2880, 1745, 1720, 1660, 1270–1230 [1]

MS: 378 [M]⁺, 318 [M − CH₃COOH]⁺, 279 [M − C₅H₇O₂]⁺ [1]

TLC: petrol – EtOAc (3:1) × 2, R_f 0.8 [1]

¹H NMR (100 MHz, CDCl₃, HMDS): 0.95 (3H, d, J = 6, H-12), 1.10 (3H, d, J = 6, H-13), 1.10 (3H, s, H-14), 1.76 (3H, s, H-15), 1.8 (3H, s, OAc), 2.72 (1H, d, J = 6, H-9), 4.75 (1H, d, J = 6, H-8), 5.30 (2H, d, J = 6, H-3, H-6); OAng: 1.87 (3H, d, J = 3, H-5′), 1.9 (3H, s, H-4′), 5.96 (1H, qd, J = 3, H-3′) [1]