(2E,3E,5E,7E,9E)-2-ethylidene-4,10-dimethyl-11-oxo-11-{(3aS,6S,6aR)-5-oxo-3a-[2-(phenylselanyl)ethoxy]hexahydro-2H-furo[3,2-b]pyrrol-6-yl}undeca-3,5,7,9-tetraenoic acid methyl ester

(2S)-2-{2-[(tert-butoxycarbonyl)oxy]ethyl}-2-methoxy-4-[(2E,4E,6E,8E,10E)-10-(methoxycarbonyl)-2,8-dimethyldodeca-2,4,6,8,10-pentaenoyl]-5-oxo-2,5-dihydropyrrole-1-carboxylic acid tert-butyl ester