T-2307, a broad-spectrum arylamidine compound, demonstrates potent antifungal properties both in vitro and in vivo. Its activity extends to clinically significant pathogens such as Candida species (MIC range: 0.00025 to 0.0078 μg ml), Cryptococcus neoformans (MIC range: 0.0039 to 0.0625 μg ml), and Aspergillus species (MIC range: 0.0156 to 4 μg mL).