(2R,6R,7R)- AND (2S,6R,7R)-7-[[(2R)-2-AMINO-2-PHENYLACETYL]AMINO]-3-CHLORO-8-OXO-5-THIA- 1-AZABICYCLO[4.2.0]OCT-3-ENE-2-CARBOXYLIC ACID (DELTA-3-CEFACLOR)
229308-90-1