Abstract
From stems of Aristolochia chamissonis Duch., five new diterpenes, one rearranged (4→2)-abeo-clerodane and four ent-clerodanes, were isolated. Their structures were determined to be (+)-(4→2)-abeo-kolavelool-3-oic acid, (−)-13-epi-2-oxokolavelool, (−)-2β-hydroxykolavelool, (−)-2β-hydroperoxykolavelool and (+)-13-epi-2α-hydroxykolavelool. In addition, lignans, sesquiterpenes, steroids and two known ent-clerodane diterpenes were isolated.
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