85
Fig. 19 1,10-Epoxyfuranoeremophilan-9-ones and 1,10-epoxyfuranoeremophilan-9-ols
Table 8 Samples 1–3 of L. atroviolacea and their chemical constituents
No.
Specimen
number
(year)
Collection
place
Elevation
(m)
Bicyclic
eremophilanes
10H Tricyclic
eremophilanes
10-OH
Tricyclic
eremophilanes Others Ref.
1
2002-01 Yulong
(Y)
2900
−
204, 205, 224
−
−
[48]
2
(2001)
Lijiang
(Y)
a
−
215, 498, 499,
500, 501, 510
−
−
[146,
208]
3
(2001)
Lijiang
(Y)
a
41, 42
212, 215, 352,
491, 498, 499,
501, 503, 504,
510, 582
237, 238,
239, 241
628
[69]
a Not described
M = 244). An additional contribution was published on L. atroviolacea reporting the
characterization of two cis- and trans-dicarboxylic acids (41 and 42), six furanoeremophilanes (212, 215, 237, 238, 239, and 241), eight eremophilanolides (352, 491,
498, 499, 501, 503, 504, and 510), and two dimeric compounds (582 and 628) [69].
The structure of 241 was determined as a 1α-chlorinated compound by X-ray crystallographic analysis. Compound 582 is a homodimer of eremophil-3-ene(12,8α),(15,6α)-diolide. The structure of 628 is interesting as it contains a dimeric
Chemical Constituents of Ligularia Species (Asteraceae) and Their Diversity…