(4R,5S)-3-[(2R,3S)-1-Benzyl-2-(5-benzyloxy-2,4-dimethoxy-3-methyl-phenyl)-4-oxo-azetidin-3-yl]-4,5-diphenyl-oxazolidin-2-one

(1R,9S,12S)-3-Benzyloxy-12-(5-benzyloxy-2,4-dimethoxy-3-methyl-benzyl)-4-(3-hydroxy-propoxy)-6-methoxy-5-methyl-10-oxo-11,13-diaza-tricyclo[7.3.1.02,7]trideca-2,4,6-triene-13-carboxylic acid 2-methoxycarbonyl-ethyl ester