naphthomycin naphthomycin naphthomycins are a group of closely related antimicrobial chemical compounds isolated from streptomyces. they are considered a subclass of ansamycins. members include: naphthomycin a naphthomycin b naphthomycin c naphthomycin d naphthomycin e naphthomycin f naphthomycin g naphthomycin h naphthomycin i naphthomycin j naphthomycin k naphthomycin l naphthomycin m naphthomycin n chemical structures naphthomycin a naphthomycin b naphthomycin c naphthomycin d naphthomycin e naphthomycin f naphthomycin g