The Antarctic red sponge Kirkpatrickia variolosa yielded a new stilbene derivative, resveratrol triacetate (3,4',5-triacetoxystilbene, 1), in addition to a known variolin alkaloid. The isolation, characterization, and unambiguous assignments of the 1H- and 13C-nmr spectra of 1 are reported. © 1995, American Chemical Society. All rights reserved.