Oasomycin B is a bacterial metabolite that has been found inS. baldaciiand has antiprotozoal activity.1It is active againstT. vaginalis(MIC = 62.5 μg/ml). 1.Grabley, S., Kretzschmar, G., Mayer, M., et al.Secondary metabolites by chemical screening, 24. Oasomycins, new macrolactones of the desertomycin familyLiebigs Ann. Chem.5573-589(1993)