beta-Methyl vinyl phosphate (MAP);(4R,5S,6S)-3-(Diphenyloxy)phosphoryloxy-6-[(1R)-1-hydroxyethyl]-4-methyl-7-oxo-1-azabicyclo[3,2,0]hept-2-ene-2-carboxylate;P-Nitrobenzyl (1R,5R,6S)-6-[(1R)-1-hydroxyethyl]-2-;β-METHYL VINYL PHOSPHATE(MAP);Intermediate of Meropenem;PNB(4R,5S,6S)-3-(diphenyl-oxy)phosphoryloxy-6-[(1R)-1-hydroxyethyl]-4-methyl-7-oxo-1-azabicyclo[3,2,0]hept-2-ene-2-carboxylate;MVP;PNB (1R,5S,6S)-2-(diphenyloxy)phosphoryloxy-6-[(1R)-1-hydroxyethyl]-1-methyl-1-carbapen-2-em-3-carboxylate;[4R-[4α, 5β,6β(R*)]]-3-[(diphenoxyphosphinyl)oxy]-6-(1-hydroxyethyl)-4-methyl-7-oxo-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic acid;MAP;Beta-Methyl vinyl phosphate;(4-nitrophenyl)methyl (4R,5R,6S)-3-diphenoxyphosphoryloxy-6-[(1R)-1-hydroxyethyl]-4-methyl-7-oxo-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylate;(4R,5R,6S)-4-Nitrobenzyl 3-((diphenoxyphosphoryl)oxy)-6-((R)-1-hydroxyethyl)-4-methyl-7-oxo-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylate;1-Azabicyclo[3.2.0]hept-2-ene-2-carboxylic acid,3-[(diphenoxyphosphinyl)oxy]-6-[(1R)-1-hydroxyethyl]-4-methyl-7-oxo-, (4-nitrophenyl)methylester, (4R,5R,6S)-;4-Nitrobenzyl (4R,5S,6S)-3-[(Diphenylphosphono)oxy]-6-[(R)-1-hydroxyethyl]- 4-methyl-7-oxo-1-azabicyclo[3.2.0]hept-2-en...;4-Nitrobenzyl (4R,5S,6S)-3-[(Diphenylphosphono)oxy]-6-[(R)-1-hydroxyethyl]- 4-Methyl-7-oxo-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylate;4-Nitrobenzyl (4R,5S,6S)-3-[(Diphenylphosphono)oxy]-6-[(R)-1-hydroxyethyl]- 4-methyl-7-oxo-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylate;4-Nitrobenzyl (4R,5S,6S)-3-[(Diphenylphosphono)oxy]-6-[(R)-1-hydroxyethyl]-4-methyl-7-oxo-1-azabicyclo[3.2.0]hept-2-ene...;4-NITROBENZYL-(1R,5R,6S)-6-[(1R)-1-HYDROXYETHYL]-2-[(DIPHENYLPHOSPHONO)OXY]-1-METHYLCARBAPEN-2-EM-3-CARBOXYLIC ACID;4-Nitrobenzyl (4R,5S,6S)-3-(Diphenyloxy)phosphoryloxy-6-[(1R)-1-hydroxyethyl]-4-methyl-7-oxo-1-azabicyclo[3,2,0]hept-2-ene-2-carboxylate;MAP(for Meropenem)