Biocromos (pigmentos) de invertebrados marinhos: I - Briozoarios

In the present paper the author reported the results obtained for the chemical caracterization of the pigments of some species of Bryozoa (Polyzoa), living in the bay and the coast near Rio de Janeiro. The pigments (biochromes) of "Bugula neritina", "Schizoporella unicornis", "Steganoporella magnilabris", "Bugula flabellata" and "Trigonospora sp", were extracted and the results showed that carotene was found in all the species, except, "Bugula neritina" and "Bugula flabellata". A new water-soluble pigment was described for "Bugula neritina". Spectrophotometric curves obtained with the Beckman spectrophotometer are reported for the "Bugula" pigment and for the carotenoids. Chromatographic analysis and the treatment with immiscible solvents were performed for all the extracts of the animals considered. A study of the biochromes of other "phyla" will be published in a near future.

Metabólitos secundários dos nudibrânquios Tambja stegosauriformis, Hypselodoris lajensis e Okenia zoobotryon e dos briozoários Zoobotryon verticillatum e Bugula dentata da costa do Brasil

The chemical investigation of the MeOH extract from the bryozoan B. dentata MeOH yielded tambjamines A (1), C (3), D (4), K (6), aldehyde 8 and the new tambjamine J1(9), while the extract of its predator, the nudibranch Tambja stegosauriformis, yielded tambjamines C and K, along with aldehyde 8. Furodisinin lactone (11) was isolated from the nudibranch Hypselodoris lajensis, a compound previously isolated from Dysidea sponges. The alkaloid 2,5,6-tribromo-N-methylgramine (12) was isolated from the nudibranch Okenia zoobotryon and from its prey, the bryozoan Zoobotryon verticillatum, the only source of 12 previously known.