Caffeic acid ester 7, cinnamic acid ester 8 and 3,4-dihydroxybenzoic acid ester 10 are more active than fluconazole, used as reference drug, both on biofilm in formation with MIC50 values of 32, 32 and 16 渭g/mL, respectively, and in the early stage of biofilm formation (4 h) with MIC50 values of 64, 32 and 64 渭g/mL, respectively. These esters result also more active than fluconazole on mature biofilm (24 h), especially 8 and 10 with MIC50 values of 64 渭g/mL.