ProductsAntibioticsButyrolactone I Butyrolactone I SKU: B057-1MG Unit: Each Brand: TOKU-E Butyrolactone I Other products from «Antibiotics» Metformin Hydrochloride # M087-5G Ascochlorin # A105-0.5MG Hemi-Oxanthromicin # H058-2.5MG Cycloheximide # C001-5G