578727-10-3 Ethanesulfonic acid, 2-[(E)-[(2-hydroxyphenyl)methylene]amino]-,monopotassium salt
57847-70-8 [6R-[6alpha,7beta(R*)]]-3-(acetoxymethyl)-7-[(5-amino-5-carboxypentanoyl)amino]-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid, potassium salt