C6 N-acetylmuramoyl-L-alanyl-D-glutamyl-meso-2,6-diaminoheptane-D-alanyl-D-alanine-diphosphoundecaprenyl-N-acetylglucosamine lipid intermediate II undecaprenyl-pyrophosphoryl-MurNAc-(pentapeptide)-N-acetylglucosamine