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Two novel aporphine related alkaloids, fissitungfines A (1) and B (2), together with two known biogenetically related alkaloids, nornuciferine (3) and annonaine (4), were isolated from the stems of Fissistigma tungfangense. Fissitungfines A (1) and B (2) were a new type of aporphine related alkaloids, possessing an unprecedented skeleton in which one six-membered carbocyclic ring in classic aporphine...
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