The molecule is a penicillin in which the substituent at position 6 of the penam ring is a 2-phenoxypropanamido group. It is a penicillin and a penicillin allergen. It is a conjugate acid of a phenethicillin(1-).
(2S,5R,6R)-3,3-dimethyl-7-oxo-6-(2-phenoxypropanoylamino)-4-thia-1-azabicyclo[3.2.0]heptane-2-carboxylic acid