4-[(4,5-dihydro-5,5-dimethyl-1H-imidazol-2-yl)methyl]-piperidine 、
6-aminopenicillanic acid 以48%的产率得到[2S-(2alpha,5alpha,6beta)]-6-[[[4-(4,5-dihydro-5,5-dimethyl-1H-imidazol-2-yl)methyl[-1-piperidinyl]methylene]amino]-4-thia]-1-azabicyclo[3.2.0]heptane-2-carboxylic acid hydrochloride