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of the aryl naphthalene type were isolated during the investigation of chemical constituents oiPhyllanthus myrtifolius. Among these, phyllamyricins A[1], B [2], and C [3] are novel natural products. Retrojusticidin B [4] has been synthesized earlier, but was obtained here as the first natural occurrence of this compound. Compounds 5 and 6 were identified as justicidins A and B, respectively. Structural elucidation of the novel compounds was based mainly on nmr spectral analysis, which also led to the complete assignment of the 'Hand 13C-nmr data of compounds 1-4 and 6.

Seven zizyphine A-type cyclopeptide alkaloids were isolated from the roots of Paliurus ramossisimus by the combination of centrifugal partition chromatography and conventional separation methods. The novel structures of paliurines A-F (1-6) were characterized and established on the basis of MS and elaborate NMR spectral analyses. Terminal dipeptide stereochemistry was confirmed by correlation with the synthetic dipeptides via comparison of their (13)C NMR data.

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