4-chlorylsulfanylbenzaldehyde;ethyl (2S)-2-[[4-[(2S,3R)-2-[[(3aS,4R,6aR)-2,3,3a,4,5,6a-hexahydrofuro[2,3-b]furan-4-yl]oxycarbonylamino]-4-[(4-formylphenyl)sulfonyl-(2-methylpropyl)amino]-3-hydroxybutyl]phenoxy]methyl-phenoxyphosphoryl]oxypropanoate;ethyl (2S)-2-[[4-[(2S,3R)-2-[[(3aS,4R,6aR)-2,3,3a,4,5,6a-hexahydrofuro[2,3-b]furan-4-yl]oxycarbonylamino]-3-hydroxy-4-[2-methylpropyl-[4-(morpholin-4-ylmethyl)phenyl]sulfonylamino]butyl]phenoxy]methyl-phenoxyphosphoryl]oxypropanoate;ethyl (2S)-2-[[4-[(2S,3R)-2-[[(3aS,4R,6aR)-2,3,3a,4,5,6a-hexahydrofuro[2,3-b]furan-4-yl]oxycarbonylamino]-3-hydroxy-4-[2-methylpropyl-(4-phenylmethoxyphenyl)sulfonylamino]butyl]phenoxy]methyl-phenoxyphosphoryl]oxypropanoate;4-phenylmethoxybenzenesulfonyl chloride