Isopropyl chloroformate → (2R)-2-(benzofuran-5-yl)-2-[(3R,6R)-3-(2,3-dihydro-1H-inden-2-yl)-6-isobutyl-2,5-dioxopiperazin-1-yl]-N,N-dimethylethanamide

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C(O[C:6]([NH:8][C@H:9]([CH:13]1[CH2:21][C:20]2[C:15](=[CH:16][CH:17]=[CH:18][CH:19]=2)[CH2:14]1)[C:10]([OH:12])=O)=[O:7])(C)(C)C.CN1CCOCC1.C(OC(Cl)=O)(C)C.[O:36]1[C:40]2[CH:41]=[CH:42][C:43]([CH:45]([NH:51][C@H:52](C(O)=O)[CH2:53][CH:54]([CH3:56])[CH3:55])[C:46]([N:48]([CH3:50])[CH3:49])=[O:47])=[CH:44][C:39]=2[CH:38]=[CH:37]1>O1CCCC1.C1(C)C=CC=CC=1.CN(C)C=O>[O:36]1[C:40]2[CH:41]=[CH:42][C:43]([C@@H:45]([N:51]3[C@H:52]([CH2:53][CH:54]([CH3:56])[CH3:55])[C:6](=[O:7])[NH:8][C@H:9]([CH:13]4[CH2:14][C:15]5[C:20](=[CH:19][CH:18]=[CH:17][CH:16]=5)[CH2:21]4)[C:10]3=[O:12])[C:46]([N:48]([CH3:49])[CH3:50])=[O:47])=[CH:44][C:39]=2[CH:38]=[CH:37]1