4-Nitrobenzenesulfonyl chloride → (3R,3aS,6aR)hexahydrofuro[2,3-b]furan-3-yl (1S,2R)-1-benzyl-3-{(1-ethylpropoxy)[(4-nitrophenyl)sulfonyl]amino}-2-hydroxypropylcarbamate

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[CH2:1]([C@H:8]([NH:19][C:20](=[O:30])[O:21][C@@H:22]1[C@H:29]2[C@H:25]([O:26][CH2:27][CH2:28]2)[O:24][CH2:23]1)[C@H:9]([OH:18])[CH2:10][NH:11][O:12][CH:13]([CH2:16][CH3:17])[CH2:14][CH3:15])[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.[N+:31]([C:34]1[CH:39]=[CH:38][C:37]([S:40](Cl)(=[O:42])=[O:41])=[CH:36][CH:35]=1)([O-:33])=[O:32].C(N(C(C)C)CC)(C)C>O1CCCC1.CN(C1C=CC=CN=1)C>[CH2:1]([C@H:8]([NH:19][C:20](=[O:30])[O:21][C@@H:22]1[C@H:29]2[C@H:25]([O:26][CH2:27][CH2:28]2)[O:24][CH2:23]1)[C@H:9]([OH:18])[CH2:10][N:11]([O:12][CH:13]([CH2:14][CH3:15])[CH2:16][CH3:17])[S:40]([C:37]1[CH:36]=[CH:35][C:34]([N+:31]([O-:33])=[O:32])=[CH:39][CH:38]=1)(=[O:41])=[O:42])[C:2]1[CH:3]=[CH:4][CH:5]=[CH:6][CH:7]=1