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Substance Name: XML 4
RN: 145497-70-7


  • A dimer of penicillin X methyl ester.

Molecular Formula

  • C34-H38-N4-O10-S2
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Names and Synonyms

Name of Substance

  • XML 4


  • XML-4

Systematic Name

  • 4-Thia-1-azabicyclo(3.2.0)heptane-2-carboxylic acid, 6-(((4-(2-hydroxy-5-(2-((2-(methoxycarbonyl)-3,3-dimethyl-7-oxo-4-thia-1-azabicyclo(3.2.0)hept-6-yl)amino)-2-oxoethyl)phenoxy)phenyl)acetyl)amino)-3,3-dimethyl-7-oxo-, methyl ester, (2S-(2alpha,5alpha,6beta(2R*,5S*,6S*)))-

Registry Numbers

CAS Registry Number

  • 145497-70-7

System Generated Number

  • 0145497707