D. kyselina (2R,4S)-2-{(RS)-1-karboxy-1-[(R)-2-amino-2-fenylacetamido]methyl} -5,5-dimethylthi-azolidin-4-karboxylová (penicilové kyseliny ampicilinu),
D. kyselina (2R,4S)-2-{(RS)-1-karboxy-1-[(R)-2-amino-2-fenylacetamido]methyl} -5,5-dimethylthi-azolidin-4-karboxylová (penicilové kyseliny ampicilinu),