3843943 -OEChem-02060822582D 0 0 0 0 0 0 0 0 0999 V2000 M END > 3843943 > 2 > ChemIDplus > XH9410000 > NIOSH/XH9410000 > 4-Thia-1-azabicyclo(3.2.0)heptane-2-carboxylic acid, 3,3-dimethyl-7-oxo- 6-(2-phenylacetamido)-, ammonium salt Benzylpenicillin ammonium Penicillin G ammonium XH9410000 > XH9410000 > http://chem.sis.nlm.nih.gov/chemidplus/ > http://chem.sis.nlm.nih.gov/chemidplus/direct.jsp?result=advanced®no=XH9410000 $$$$