Citric Acid → N-(tert-butoxycarbonyl)-2-aminoethanethiol

Reaction equation

[BH4-:16].[C:1]([CH3:2])([CH3:3])([CH3:4])[O:5][C:6](=[O:7])[NH:8][CH2:9][CH2:10][S:11][S:12][CH2:13][CH2:14][NH2:15].[CH3:31][CH2:32][OH:33].[Na+:17].[OH:18][C:19]([CH2:20][C:21]([C:22](=[O:23])[OH:24])([CH2:25][C:26](=[O:27])[OH:28])[OH:29])=[O:30]>>[C:1]([CH3:2])([CH3:3])([CH3:4])[O:5][C:6](=[O:7])[NH:8][CH2:9][CH2:10][SH:11]