247 (tricycloalterfurene A)
O
OH
OH
O
251 (tricycloalternarene A)
O
O
O
OH
OH
252 (tricycloalternarene B)
O
O
OH
OH
253 (tricycloalternarene C)
O
O
OH
O
248 (tricycloalterfurene B)
O
O
OH
O
COOH
249 R 1 = OH, R 2 = H (tricycloalterfurene C)
250 R 1 = H, R 2 = OH (tricycloalterfurene D)
O
O
R 1
O
R 2
OH
OH
O
OH
R 1
R 2
O
258 R 1 = H, R 2 = OH (bicycloalternarene E)
259 R 1 = OH, R 2 = H (bicycloalternarene F)
OH
O
O
R 1
O
R 2
OH
256 R 1 = OH, R 2 = H (bicycloalternarene C)
257 R 1 = H, R 2 = OH (bicycloalternarene D)
O
OH
254 (bicycloalternarene A)
O
O
HO
OH
OH
OH
255 (bicycloalternarene B)
O
O
HO
OH
OH
OH
260 R 1 = OH, R 2 = OMe, R 3 = H (monocycloalternarene A)
261 R 1 = H, R 2 = COOH, R 3 = OH (monocycloalternarene B)
R 2
R 3
R 1
OH
OH
OH
OH
O
OH
O
262 (monocycloalternarene C)
263 ∆ (monocycloalternarene D)
COOH
O
O
HO
O
O
O
O
O
NH
269 (aspergstressin)
O
O
O
O
O
OH O
O
264 (1,2-dihydroterretonin F)
O
O
O
O
O
OH
OH
OH
R 1
R 2
R 3
265 R 1 = Me, R 2 + R 3 = O (aspertetranone A)
266 R 1 = Me, R 2 = R 3 = H (aspertetranone B)
267 R 1 = H, R 2 + R 3 = O (aspertetranone C)
268 R 1 = Me, R 2 = H, R 3 = OH (aspertetranone D)
Fig. 15 Structures of merosesquiterpenes (part 5)
106
Z. Liu et al.