penicillin 6beta-[(p-hydroxybenzylidene)amino]penicillanic acid (2S,5R,6R)-6-[(4-hydroxybenzylidene)amino]-3,3-dimethyl-7-oxo-4-thia-1-azabicyclo[3.2.0]heptane-2-carboxylic acid 320.083 320.36400 6-[(p-hydroxybenzylidene)amino]penicillanic acid 6beta-[(4-hydroxybenzylidene)amino]-2,2-dimethylpenam-3alpha-carboxylic acid C15H16N2O4S CHEBI:73187 InChI=1S/C15H16N2O4S/c1-15(2)11(14(20)21)17-12(19)10(13(17)22-15)16-7-8-3-5-9(18)6-4-8/h3-7,10-11,13,18H,1-2H3,(H,20,21)/t10-,11+,13-/m1/s1 MCTUMEOQLDXESY-NTZNESFSSA-N PMID:23452214 Penicillanic acid carrying a (p-hydroxybenzylidene)amino substituent at the 6beta position. It has been used as a hapten in the production of a generic monoclonal antibody for determining penicillin residues in milk. [H]C(=N[C@@H]1C(=O)N2[C@@H](C(O)=O)C(C)(C)S[C@]12[H])c1ccc(O)cc1 chebi_ontology hapten 2 HAPA hapten HAPA