Abstract
The extract of the White Sea sponge Halichondria panicea (Pallas, 1766) exhibits cytotoxic and cytostatic effects. The main part of the extract consists of hydrophilic low molecular weight compounds: free amino acids (13.9%), glucose (19.9%), polyatomic alcohols (glycerin and others) (6.1%), carboxylic acids (0.7%) and nitrogenous heterocycles (1.2%). Of the substances specific to the metabolome, bicyclic diketopiperazines (four derivatives), pyroglutamic acid, phenylacetic acid, and two steroids (3β,5α)cholest-7-en-3-ol and dihydrocholesterol were identified. Toxicants characteristic of the genus Halichondria were not found in the White Sea sponge.
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