Etacillina; Hetacilina; Hetacilline; Hetacillinum; Phenazacillin; Versapen; Etacillina [DCIT]; HETACILLIN POTASSIUM; BRL 804; BL-P 804; BRL-804; Hetacilina [INN-Spanish]; Hetacilline [INN-French]; Hetacillinum [INN-Latin]; Versapen (TN); Hetacillin (USAN/INN); Hetacillin [USAN:INN:BAN]; N,N'-Isopropylidene-A-amino-benzyl penicillin; (2S,%R,6R)-6-(2,2-Dimethyl-5-oxo-4-phenyl-1-imidazolidinyl)-3,3-dimethyl-7-oxo-4-thia-1-azabicyclo(3.2.0)heptan-2-carbonsaeure; (2S,5R)-6-[(4R)-2,2-dimethyl-5-oxo-4-phenylimidazolidin-1-yl]-3,3-dimethyl-7-oxo-4-thia-1-azabicyclo[3.2.0]heptane-2-carboxylic acid; (2S,5R,6R)-6-(2,2-dimethyl-5-oxo-4-phenylimidazolidin-1-yl)-3,3-dimethyl-7-oxo-4-thia-1-azabicyclo[3.2.0]heptane-2-carboxylic acid; (2S,5R,6R)-6-[(4R)-2,2-dimethyl-5-oxo-4-phenylimidazolidin-1-yl]-3,3-dimethyl-7-oxo-4-thia-1-azabicyclo[3.2.0]heptane-2-carboxylic acid; 6-(2,2-Dimethyl-5-oxo-4-phenyl-1-imidazolidinyl)-3,3-dimethyl-7-oxo-4-thia-1-azabicyclo(3.2.0)heptane-2-carboxylic acid; 6-(2,2-Dimethyl-5-oxo-4-phenyl-1-imidazolidinyl)penicillansaeure; 6-(2,2-dimethyl-5-oxo-4-phenylimidazolidin-1-yl)-3,3-dimethyl-7-oxo-4-thia-1-azabicyclo[3.2.0]heptane-2-carboxylic acid; 6beta-[(4R)-2,2-dimethyl-5-oxo-4-phenylimidazolidin-1-yl]-2,2-dimethylpenam-3alpha-carboxylic acid; 6beta-[(4R)-2,2-dimethyl-5-oxo-4-phenylimidazolidin-1-yl]penicillanic acid