title: In vitro antimicrobial activity of a new semisyntheti penicillin, BL-P 1654 (6-(R- -(guanylureido) phenylacetamido)-penicillanic acid).
mesh_terms: D001431:Bacteriological Techniques; D004755:Enterobacteriaceae / Q000187:drug effects; D008826:Microbial Sensitivity Tests; D010403:Penicillin Resistance; D010406:Penicillins / Q000494:pharmacology; D011549:Pseudomonas / Q000187:drug effects; D013210:Staphylococcus / Q000187:drug effects; D013291:Streptococcus / Q000187:drug effects
chemical_list: D010406:Penicillins