The global yield of extraction is not improved by the pretreatment when using ethanol as solvent in conventional extraction (CSE), although there is a clear increase in the extraction of the target compounds, rosmarinic and carnosic acid, when the leaves are deoiled by Solvent Free Microwave Extraction, in agreement with Navarrete et al. (2011). Also, the milling process increases the yield of these compounds, although to a lower degree.