(8E,14E,16E,18E,20E)-22-[(3-amino-3,6-dideoxyhexopyranosyl)oxy]-1,3,26-trihydroxy-12-methyl-10-oxo-6,11,28-trioxatricyclo[22.3.1.0~5,7~]octacosa-8,14,16,18,20-pentaene-25-carboxylic acid
Natamycin is a polyene amphoteric macrolide antibiotic with antifungal properties. Natamycin exerts its antifungal effects by binding to sterols in the fungal cell membrane thereby increasing membrane permeability. This leads to a leakage and loss of essential cellular constituents. Following ocular application, natamycin is retained in the conjunctival fornices and attains effective concentrations within the corneal stroma where it exerts its effect.