Lithium tri-s-butylborohydride → 17-Ethyl-1-hydroxy-14-(tert-butyldimethylsiloxy)-12-[2'-(4"-(2"'-phenyl-2"'-hydroxyethyloxy)-3"-methoxycyclohexyl)-1'-methylvinyl]-23,25-dimethoxy-13,19,21,27-tetramethyl-11,28-dioxa-4-azatricyclo[22.3.1.04,9]octacos-18-ene-2,3,10,16-tetraone

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[CH2:1]([CH:3]1[CH:29]=[C:28]([CH3:30])[CH2:27][CH:26]([CH3:31])[CH2:25][CH:24]([O:32][CH3:33])[CH:23]2[O:34][C:19]([OH:38])([CH:20]([CH3:37])[CH2:21][CH:22]2[O:35][CH3:36])[C:18](=[O:39])[C:17](=[O:40])[N:16]2[CH:11]([CH2:12][CH2:13][CH2:14][CH2:15]2)[C:10](=[O:41])[O:9][CH:8]([C:42]([CH3:62])=[CH:43][CH:44]2[CH2:49][CH2:48][CH:47]([O:50][CH2:51][C:52]([C:54]3[CH:59]=[CH:58][CH:57]=[CH:56][CH:55]=3)=[O:53])[CH:46]([O:60][CH3:61])[CH2:45]2)[CH:7]([CH3:63])[CH:6]([O:64][Si:65]([C:68]([CH3:71])([CH3:70])[CH3:69])([CH3:67])[CH3:66])[CH2:5][C:4]1=[O:72])[CH3:2].CCC(C)[BH-](C(C)CC)C(C)CC.[Li+]>C1COCC1>[CH2:1]([CH:3]1[CH:29]=[C:28]([CH3:30])[CH2:27][CH:26]([CH3:31])[CH2:25][CH:24]([O:32][CH3:33])[CH:23]2[O:34][C:19]([OH:38])([CH:20]([CH3:37])[CH2:21][CH:22]2[O:35][CH3:36])[C:18](=[O:39])[C:17](=[O:40])[N:16]2[CH:11]([CH2:12][CH2:13][CH2:14][CH2:15]2)[C:10](=[O:41])[O:9][CH:8]([C:42]([CH3:62])=[CH:43][CH:44]2[CH2:49][CH2:48][CH:47]([O:50][CH2:51][CH:52]([C:54]3[CH:59]=[CH:58][CH:57]=[CH:56][CH:55]=3)[OH:53])[CH:46]([O:60][CH3:61])[CH2:45]2)[CH:7]([CH3:63])[CH:6]([O:64][Si:65]([C:68]([CH3:69])([CH3:70])[CH3:71])([CH3:67])[CH3:66])[CH2:5][C:4]1=[O:72])[CH3:2]