has role is protonated form of is tautomer of has functional parent 6-aminopenicillanic acid CHEBI:2172 Penicin Aminopenicillanic acid A penicillanic acid compound having a (6<i>R</i>)-amino substituent. The active nucleus common to all penicillins, it may be substituted at the 6-amino position to form the semisynthetic penicillins, resulting in a variety of antibacterial and pharmacologic characteristics. Penin 6-amino-2,2-dimethylpenam-3alpha-carboxylic acid 6-Aminopenicillanate Phenacyl 6-aminopenicillinate CHEBI:20705 6-Apa 6-APA (2S,5R,6R)-6-amino-3,3-dimethyl-7-oxo-4-thia-1-azabicyclo[3.2.0]heptane-2-carboxylic acid 6beta-aminopenicillanic acid 6-Aps 6-amino-2,2-dimethylpenam-3alpha-carboxylic acid 6-Aminopenicillanic acid 6-Aminopenicillamine acid (+)-6-aminopenicillanic acid penicillanic acids 6-aminopenicillanate penicillanic acid allergen 6-aminopenicillanic acid zwitterion