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The objective of the study was to know relationships of clustered Pinanga of Java and Bali based on morphologicalcharacters. Observation was done to 115 clustered Pinanga specimens (P. coronata), 18 of which were assigned asOperational Taxonomic Units (OTUs). The morphological characters noted, analyzed using versions of the numericaltaxonomy system / NTSYS version 1.80, 1993. The phenogram presents that clustered Pinanga of Java and Bali divided into two groups (clusters): specimens from lowland forest (0-750 m asl) and specimens from montane forest (750 m asl or more). The cluster division is not dependent on the geographical distribution of the OTUs, but rather altitudes.© 2003 Jurusan Biologi FMIPA UNS SurakartaKey words: Java, Bali, NTSYS, OTUs, clustered Pinanga, phenetic study.

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Two novel zierane-type sesquiterpenes, named melicodenones A and B (1 and 2, resp.), and three new guaiane-type sesquiterpenes, named melicodenones C-E (3-5), were isolated from the root of Melicope denhamii (Seem.) T. G. Hartley together with zierone (6). Their structures were established by extensive NMR-spectroscopic analyses. Compounds 1-6 were tested for cytotoxicity using human colon cancer DLD-1 cells, and melicodenone A (1) was found to exhibit moderate activity.

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