“…Biological activities which have been frequently observed in marine invertebrate crude extracts include antibiosis against both human microbial pathogens and marine microorganisms (Slattery et al, 1997;Encarnación et al, 2000;Kuniyoshi and Higa, 2001) and cytotoxicity (reviewed in Garson, 1994;Cragg and Newman, 1999;Munro et al, 1999;Rinehart, 2000;Schmitz, 1994;Mayer, 1999;Mayer and Lehmann, 2001;Mayer and Hamann, 2002;Gustafson, 2003 andMayer et al, 2007). The fact that many marine invertebrate secondary metabolites have presented both antibiotic and cytotoxic activities is not only a consequence of their intrinsic activity, but also because research towards the search for new drugs has focused mainly on these bioassays (Newman et al, 2003).…”