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A new trimethoxycinnamoyl-2-pyrrolidinone alkaloid, named langkamide (I), is isolated along with two known trimethoxycinnamoyl derivatives from roots and stems of the pepper shrub Piper sarmentosum.

The quassinoid, nothospondin (I), is obtained along with the known compound glaucarubinone.

The novel monoterpene glycosides distyloside A (I) and B (II) and the new megastigmane glucoside iso-dihydrodendranthemoside A (III) are isolated from twigs and leaves of Distylium racemosum together with five known phenolic compounds.

The extraction of three active marine soft corals of the order Alcyonacea (Sarcophyton sp., L.

Five new naphthopyrones of type (I) or (II) are isolated from crinoids of the family Comasteridae along with 6 known compounds.

Oxidation of Cr(CO) 5 - , Mo(CO) 5 - , and W(CO) 5 - was examined in a low-pressure (∼5×10 -8 mbar) and a high-pressure external(∼3.5 mbar) environment using a Fourier-transform ion cyclotron resonance spectrometer equipped with a high-pressure external ion source. Although the oxidation chemistry displayed by the Cr and W systems was fairly similar, the Mo analogue had several unique features. In addition, remarkable differences were observed between high- and low-pressure oxidation

Alkynes are carbonylated under very mild conditions to yield unsaturated diesters using a palladium (II) chloride catalyst in combination with anodic reoxidation at high-surface area graphite felt electrodes.

A cytotoxic aqueous extract from the marine hydroid Gymnangium regae provided a novel linear pentapeptide, designated gymnangiamide (1). The planar structure of 1 was elucidated by interpretation of spectral data as well as chemical degradation and derivatization studies. In addition to the amino acids isoleucine and phenylserine, this peptide contained N-desmethyldolaisoleuine, O-desmethyldolaproine, and α-guanidino serine, three residues that have not previously been reported in a natural product. The absolute configurations of the constituent amino/guanidino acids were determined by chemical degradation and derivatization, followed by HPLC and LC-MS comparison with authentic standards. Gymnangiamide (1) was moderately cytotoxic against a number of human tumor cell lines in vitro.

Aromatic amines are converted to carbamates under very mild conditions, using carbon monoxide, palladium (II) acetate and copper (II) acetate in combination with anodic reoxidation.