184
N. N. Win and H. Morita
(237), and N-{[p-(3,7-dimethyl-(6R),7-epoxy-(4R)-9
(E)-octadecenoyloxy-2octenyloxy)phenyl]ethyl} benzamide (238) [277]. Also obtained were a new dimeric
coumarin, limodissimin A (239) [278] as well as a new neolignan stereoisomer,
(7
E)-(7R,8S)-4-hydroxy-3,5
-dimethoxy-4
,7-epoxy-8,3
-neolig-7
-en-9,9
-diyil
diacetate (240) [279] (Fig. 49), together with 23 other compounds (241–262).
The other 23 compounds were identified as the previously reported coumarins,
marmesin (235) [274–276], (E)-suberenol (241) [280], (Z)-suberenol (242) [281],
osthenol (243) [282], (2
R)-7-hydroxy-8-(2
,3
-dihydroxy-3
-methylbutyl)-2H1-benzopyran-2-one (244) [283], columbianetin (245) [284], and seselin (246)
[285]; a phenol derivative, syringaldehyde (247) [286]; the furofuran lignans
(+)-yangambin (248) [287] and (+)-syringaresinol (249) [137], a quinolinone,
4-methoxy-1-methyl-2(1H)-quinolinone (250) [288] (Fig. 50); the terpenoids,
13α,14β,17α-lanosta-7,9,24-triene-3β,16α-diol (251) [289], limonin (252) [290],
rutaevin (253) [291], hederatriol (254) [292], bassic acid methyl ester (255) [293],
3β-hydroxyolean-12-en-11-one (256) [294], and the fatty acids (9E)-octadecenoic
acid (258) [295], cascarillic acid (259) [296], (+)-α-dimorphecolic acid (260) [297],
(8R)-hydroxylinoleic acid (261) (299), and (6Z,9Z,12Z)-pentadecatrienoic acid
(262) [299] (Figs. 51 and 52).
258 (E)-9-octadecenoic acid
HO
O
OH
O
259 (cascarillic acid)
OH
O
OH
260 ((+)-α-dimorphecolic acid)
OH
O
OH
261 ((8R)-hydroxylinoleic acid)
OH
O
262 ((6Z,9Z,12Z)-pentadecatrienoic acid)
Fig. 52 Structures of the known fatty acids 258–262 from an ethyl acetate extract of L. acidissima
bark grown in Myanmar