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H. Zhu et al.
O
HN
O
O
OH
OH
O
HN
O
O
OH
OH
413 (phomacin A )
414 (phomacin B)
O
HN
O
O
O
415 (aspochalasin F)
O
HN
O
O
OH
OH
O
HN
O
O
416 (aspochalasin I)
417 (aspochalasin J)
OH
O
HN
O
O
OH
OH
OH
O
HN
O
O
O
OH
418 (trichalasin C)
419 (trichalasin D)
O
HN
O
O
OH
420 (trichalasin B)
O
HN
O
O
OH
O
421 (aspochalasin A1)
O
HN
O
O
OH
HO
O
HN
O
O
OH
OOH
422 (trichalasin E)
423 (trichalasin F)
O
HN
O
O
O
HO
OH
424 (flavichalasine N4)
O
HN
O
O
OH
O
HN
O
O
OH
OH
O
HN
O
O
OH
425 (amiaspochalasin A)
427 (amiaspochalasin E)
426 (amiaspochalasin D)
OH
O
HN
O
O
OH
O
HN
O
O
O
OH
O
HN
O
O
OH
OH
431 (amiaspochalasin B)
432 (amiaspochalasin C)
428 (amiaspochalasin H)
429 (16a-methylaspochalasin J)
O
HN
O
O
OH
O
HN
O
O
OH
OH
430 (iizukine D)
433 (flavichalasine O)
O
N
H
HN
O
O
HO
OH
Fig. 17 Structures of lactone aspochalasins