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Three new carboxylated flavonoids, uncinatic acids A-C (1–3), were isolated from the whole herb of Selaginella uncinata. Their structures were established on the basis of extensive NMR analysis including 1D, 2D NMR experiments and HR-ESIMS techniques. All of them share the carboxylation structural characteristic. Compounds 1 and 2 belong to novel naturally occuring furanoflavonoids which is firstly...
Four novel dicyclic arene–homospermidine conjugates (6a–d) were synthesized and evaluated for cytotoxicity in L1210, α-difluoromethylornithine (DFMO) treated L1210, melanoma B16, spermidine (SPD) treated B16, and Hela cells. In the DFMO-treated L1210 experiments, 6a–d were more sensitive to DFMO than naphthalene-homospermidine (6e), suggesting that 6a–d can utilize the polyamine transporter (PAT)...
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