(6R)-6-(2, 6-Dioxo-5-(trifluoromethyl)-1, 2, 3, 6-tetrahydropyrimidin-4-yl)tetrahydro-4h-furo(3, 2-d)(1, 3, 2)dioxaphosphinin-2-olate 2-oxide

(6R)-6-(5-Bromo-2, 6-dioxo-1, 2, 3, 6-tetrahydropyrimidin-4-yl)tetrahydro-4H-furo(3, 2-d)(1, 3, 2)dioxaphosphinin-2-olate 2-oxide

(6R)-6-(5-Iodo-2, 6-dioxo-1, 2, 3, 6-tetrahydropyrimidin-4-yl)tetrahydro-4h-furo(3, 2-d)(1, 3, 2)dioxaphosphinin-2-olate 2-oxide

(6R)-6-(5Chloro-2, 6-dioxo-1, 2, 3, 6-tetrahydropyrimidin-4-yl)tetrahydro-4h-furo(3, 2-d)(1, 3, 2)dioxaphosphinin-2-olate 2-oxide

(6R)-9-Azabicyclo(4.2.1)non-4-ene-5-carbaldehyde

(6R)-N-Methoxy-9-azabicyclo(4.2.1)non-4-ene-5-carboxamide (E)-but-2-enedioate

(6R, 7R)-3-Chloromethyl-7-((Z)-2-(5-amino-1, 2, 4-thiadiazol-3-yl)2-((1-carboxy-1-methylethoxy)imino)acetylamino)-8-oxo-5-thia-1-azbicyclo(4.2.0)oct-2-ene-2-carboxylic acid p-methoxybenzyl ester

(6R, 7R)-7-((R)-2-Amino-2-phenylacetamido)-3-ethyl-8-oxo-5-thia-1-azabicyclo(4.2.0)oct-2-ene-2-carboxylic acid

(6R, 7R)-Benzhydryl 3-hydroxy-8-oxo-7-(2-phenylacetamido)-5-thia-1-azabicyclo(4.2.0)oct-2-ene-2-carboxylate

(6R-(6alpha, 7beta(R*)))-3-(Acetoxymethyl)-7-((formyloxy)phenylacetamido)-8-oxo-5-thia-1-azabicyclo(4.2.0)oct-2-ene-2-carboxylic acid

(6R-(6alpha, 7beta(R*)))-3-(Acetoxymethyl)-7-(amino(4-hydroxyphenyl)acetamido)-8-oxo-5-thia-1-azabicyclo(4.2.0)oct-2-ene-2-carboxylic acid

(6R-(6alpha, 7beta(R*)))-3-(Acetoxymethyl)-7-(hydroxyphenylacetamido)-8-oxo-5-thia-1-azabicyclo(4.2.0)oct-2-ene-2-carboxylic acid

(6R-(6alpha, 7beta(R*)))-7-((Amino(4-hydroxyphenyl)acetyl)amino)-8-oxo-3-((1H-1, 2, 3-triazol-4-ylthio)methyl)-5-thia-1-azabicyclo(4.2.0)oct-2-ene-2-carboxylic acid, compound with methanol (1:1)

(6R-(6alpha, 7beta(R*)))-7-((Amino(4-hydroxyphenyl)acetyl)amino)-8-oxo-3-((1H-1, 2, 3-triazol-4-ylthio)methyl)-5-thia-1-azabicyclo(4.2.0)oct-2-ene-2-carboxylic acid, compound with propane-1, 2-diol

(6R-(6alpha, 7beta(R*)))-7-(Amino(4-hydroxyphenyl)acetamido)-3-methyl-8-oxo-5-thia-1-azabicyclo(4.2.0)oct-2-ene-2-carboxylic acid monohydrochloride

(6R-(6alpha, 7beta(R*)))-7-(Aminocyclohexa-1, 4-dien-1-ylacetamido)-3-methyl-8-oxo-5-thia-1-azabicyclo(4.2.0)oct-2-ene-2-carboxylic acid monohydrochloride

(6R-(6alpha, 7beta(Z)))-3-(Acetoxymethyl)-7-((2-(chloroacetamido)thiazol-4-yl)(methoxyimino)acetamido)-8-oxo-5-thia-1-azabicyclo(4.2.0)oct-2-ene-2-carboxylic acid

(6R-(6alpha, 7beta))-3-(((1-Methyl-1H-tetrazol-5-yl)thio)methyl)-8-oxo-7-(phenylacetamido)-5-thia-1-azabicyclo(4.2.0)oct-2-ene-2-carboxylic acid 5-oxide

(6R-(6alpha, 7beta))-3-(Acetoxymethyl)-7-(hydroxyphenylacetamido)-8-oxo-5-thia-1-azabicyclo(4.2.0)oct-2-ene-2-carboxylic acid

(6R-(6alpha, 7beta))-3-Methyl-8-oxo-7-(phenylacetamido)-5-thia-1-azabicyclo(4.2.0)oct-2-ene-2-carboxylic acid 5-oxide