133
X-ray analysis (Sect. 3.13) [235]. Sample 4 produced eight bisabolane sesquiterpenoids (647, 651, 654, songaricalarin F (660), 680, songaricalarin H (690), 698
(major constituent), and songaricalarin G (700)) [224, 232]. Six of these bisabolane
sesquiterpenoids proved to be highly oxidized and similar to those isolated from
L. lankongensis [228]. Among the four samples investigated, only sample 3 produced oplopanes, and hence its chemical composition was different from the other
three samples. As mentioned above, the four samples described were collected in
Fig. 56 Triterpenoids (2)
Chemical Constituents of Ligularia Species (Asteraceae) and Their Diversity…
X-ray analysis (Sect. 3.13) [235]. Sample 4 produced eight bisabolane sesquiterpenoids (647, 651, 654, songaricalarin F (660), 680, songaricalarin H (690), 698
(major constituent), and songaricalarin G (700)) [224, 232]. Six of these bisabolane
sesquiterpenoids proved to be highly oxidized and similar to those isolated from
L. lankongensis [228]. Among the four samples investigated, only sample 3 produced oplopanes, and hence its chemical composition was different from the other
three samples. As mentioned above, the four samples described were collected in
Fig. 56 Triterpenoids (2)
Chemical Constituents of Ligularia Species (Asteraceae) and Their Diversity…