81
Fig. 16 Furanoeremophil-1(10)-en-2-ones and furanoeremophil-1(10)-en-2-ol
Fig. 17 Furanoeremophil-1(10)-en-9-ones
established by ECD spectroscopy. This group also identified five aromatic derivatives (908, 927, 931, 935, and 937), as well as lupeol (828), and compounds 860
and 898 from the same plant source (sample 5) [248]. The absolute configuration
at C-3 of 937 was determined to be (S), by comparing the specific rotation of 937
with that of the 3′,4′-dihydroxy derivative, taraxafolin. Two chemotypes may exist
in this species based on these results, namely, a bisabolane-producing type and a
non-bisabolane- producing type. A review of this species by Yaoita was published
in 2012 [285].
Chemical Constituents of Ligularia Species (Asteraceae) and Their Diversity…
Fig. 16 Furanoeremophil-1(10)-en-2-ones and furanoeremophil-1(10)-en-2-ol
Fig. 17 Furanoeremophil-1(10)-en-9-ones
established by ECD spectroscopy. This group also identified five aromatic derivatives (908, 927, 931, 935, and 937), as well as lupeol (828), and compounds 860
and 898 from the same plant source (sample 5) [248]. The absolute configuration
at C-3 of 937 was determined to be (S), by comparing the specific rotation of 937
with that of the 3′,4′-dihydroxy derivative, taraxafolin. Two chemotypes may exist
in this species based on these results, namely, a bisabolane-producing type and a
non-bisabolane- producing type. A review of this species by Yaoita was published
in 2012 [285].
Chemical Constituents of Ligularia Species (Asteraceae) and Their Diversity…