特異性:Penicillin, Ampicillin, Amoxicillin, Cloxacillin, Hetacillin (includes BSA Penicillins G, V, N, ampicillin, amoxicillin, hetacillin, cloxacillin, and other antibiotics with penicillanic acid core. Much higher affinity for hydrolyzed (open) beta-lactam