(3S,7R,10S)-methyl-2-oxo-3-N-phthaloylamino-1-azabicyclo[5.3.0]decane-10-carbohylate

(S)-2-[(S)-2-(1,3-Dioxo-1,3-dihydro-isoindol-2-yl)-pent-4-enoylamino]-5,5-dimethoxy-pentanoic acid methyl ester