4-Acetoxyazetidin-2-one (4-AA , 4-ABA or 4-AOSA) β-Methylazetidin-2-one (1-BMA or 4-BMA) 1β-Methyl vinyl phosphate (MAP or MVP) Side chain for meropenem (2S-CIS) Protected meropenem p-nitrobenzyl-6-(1-hydroxyethyl)-1-azabicyclo(3.2.0)... ... Bis Protected Imipenem Protected thiencin Hydrochloride Thienamycin p-nitrobenzylester hydrochloride... Side Chain for Imipenem Side chain for penipenem Side chain for biapenem Side chain for ertapenem --------------------------------------- (R)-(+)-BINAP (S)-(-)-BINAP (2S, 4S)-BPPM (+)-L-2,10-Camphorsultam L－Hydroxyproline (R)-(+)-2-Tetrahydrofuroic acid S-(+)-2,2-Dimethylcyclopropane carboxylic acid S-(+)-2,2-Dimethylcyclopropane carboxamide -------------------------------- Diethyl chlorophosphate or Diethyl ... Diisopropl chlorophosphate or Diisopropl ... Diphenyl chlorophosphate or Diphenyl ... Diphenylphosphinyl chloride or ... Tri-n-butylphosphine or Phosphine, tributyl Diphenylphosphine or phosphine, diphenyl Diphenylphosphine chloride or ... p-Dodecylbenzenesulfonyl azide or ... p-Toluenesulfonyl azide or ... Dimethyl acetone-1,3-dicarboxylate or ... Diethyl acetone-1,3-dicarboxylate or ... 1,3-Acetonedicarboxylic acid or ... Anhydrous magnesium mono-p-nitrobenzyl ... Anhydrous magnesium monobenzyl ... Methyl (or ethyl) 2-(N-benzoylaminometheyl)-3-oxobutyrate Methyl (or ethyl) 2-(N- phthalimidomethyl)-3-oxobutyrate ----------------------------------- dl-Muscone Cyclopentandecanone Cyclopentadecanolide or Oxacyclohexadecan-2-one 11-Oxahexadecanolide or ... (-)-Menthyl lactate or ... L-Menthone-1,2-glycerol ketal or ...