[Studies on the chemical constituents of marine sponge Iotrochota sp].

To study the chemical constituents from the marine sponge Iotrochota sp. The compounds were isolated and purified by various column chromatography methods, and their structure wer identified cholesterol (1), nonadecyl ethers of glycerol (2), p-hydroxybenzaldehyde (3), (E)-4-(3,4-dihydroxyphenyl) but-3-en-2-one (4), 3,4-dihydroxybenzaldehyde (5), ethyl vanillin (6), hendecanoic acid (7), tricosane (8). All compounds are isolated from marine sponge Iotrochota sp. for the first time.