Eleutherol is a naphthalene isolated from E. americana with antifungal activities[1]. Eleutherol is against yeasts Candida albicans, C. tropicalis, Saccharomyces cerevisiae and Cryptococcus neoformans with MIC values between 7.8 µg/mL and 250 µg/mL[1]. Eleutherol inhibits α-glucosidase function with an IC50>1.00 mM[2].
[1]. Adriana Campos, et al. Antifungal Activity of Pyranonaphthoquinones Obtained from Cipura paludosa Bulbs. Nat Prod Commun. 2015 Sep;10(9):1589-92. [2]. Tomohiro Ieyama,et al.α-Glucosidase inhibitors from the bulb of Eleutherine americana. Food Chem.2011 Sep 15;128(2):308-11.