mezlocillin , 6- [ d-2- ( 2-oxo-3-mesyl-imidazolidine-1-carboxamido ) - 2-phenylacetamido ] -penicillanic acid , is a new semisynthetic acylureido-penicillin with a broad spectrum of antibacterial activity .
C0030820
penicillanic acid
C0030842
penicillin