(E)-(3S,10R,16S)-16-[(E)-(R)-3-(4-Benzoyl-phenyl)-1-methyl-allyl]-3-isobutyl-10-(4-methoxy-benzyl)-1,4-dioxa-8,11-diaza-cyclohexadec-13-ene-2,5,9,12-tetraone

dimethyl (3S,4S)-4-methoxy-6-(4'-methoxybenzyloxy)-3-methyl-2-oxohexylphosphonate