67
cacalol (316) is the same as that of the eremophilanes. Sample 15 produced virgaurenones A (274) and B (273) and their derivatives [114]. Virgaurenolides A–E (463,
460, 459, 461, 462) are oxidized derivatives of virgaurenones found in samples of the
V type (samples 15 and 24). Cacalol (316) and 6-hydroxyeuryopsyn (248) were the
major constituents of sample 16 [45]. Sample 16 also produced two eremophil-1(10)ene derivatives (528 and 571; a dimer of 1(10)-ene and cacalol), three 1(10)-en-9-one
Fig. 5 Bicyclic eremophilanes (5)
Chemical Constituents of Ligularia Species (Asteraceae) and Their Diversity…
cacalol (316) is the same as that of the eremophilanes. Sample 15 produced virgaurenones A (274) and B (273) and their derivatives [114]. Virgaurenolides A–E (463,
460, 459, 461, 462) are oxidized derivatives of virgaurenones found in samples of the
V type (samples 15 and 24). Cacalol (316) and 6-hydroxyeuryopsyn (248) were the
major constituents of sample 16 [45]. Sample 16 also produced two eremophil-1(10)ene derivatives (528 and 571; a dimer of 1(10)-ene and cacalol), three 1(10)-en-9-one
Fig. 5 Bicyclic eremophilanes (5)
Chemical Constituents of Ligularia Species (Asteraceae) and Their Diversity…