About 6-APA
About 6-APS
About 6α-Aminopenicillanic acid
About (6R)-6-Aminopenicillanic acid
About (6R)-6α-Aminopenicillanic acid
About 6-Aminopenicillanic acid
About Penicillins
About carboxylic acid
About lactam
About primary amine
About sulfur heterocyclic compound