Remove any protecting groups that were added in step 2 to expose functional groups that will be involved in the next addition.
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1-((2S,3S,5R,6R)-4-Acetyl-2,3-diisopropyl-5,6-diphenyl-piperazin-1-yl)-ethanone
(1S,3S)di(l)menthyl caronate
1-(2-Hydroxymethyl-phenyl)-4-(4-methoxy-benzyloxy)-4-methyl-pent-2-yn-1-one
Lactacillanic acid
tetra-N-benzyl-5,6-O-cyclohexylidene-tetra-N-methoxycarbonylneamin
3-Hexen-1-ol, 4-methyl-6-(2,6,6-trimethyl-1-cyclohexen-1-yl)-, (Z)-
(2S,3S)-3,4-diphenyl-2-methyl-2,3-epoxy-1-butanol
Methyl (4,5,6S)-7-<(1S,2S,3S)-3-hydroxy-2-<(E)-(3S)-3-hydroxy-4-phenoxy-1-butenyl>-5-oxocyclopentyl>-4,5-heptadienoate
dimethylthexylsilyl O-(methyl 2-O-levulinoyl-3-O-benzyl-4-O-(9-O-fluorenylmethoxycarbonyl)-β-D-glucopyranosyluronate)-(1->4)-O-2-azido-3-O-benzyl-2-deoxy-6-O-acetyl-β-D-glucopyranoside
3-(3-HYDROXY-PROPYLAMINO)-PROPAN-1-OL
(S)-2-[Methanesulfonyl-(2-nitro-benzyl)-amino]-propionic acid
(1R,2S,6S,7R,8R)-7-Benzyloxy-3,5,10,11-tetraoxa-4-thia-tricyclo[6.2.1.02,6]undecane 4,4-dioxide
bis-1,8-(t-butyldiphenylsilyl)-1,3,5,7-octatetrayne
N-(2,6-dimethylphenyl)-L-alanine
Octadecanoic acid (R)-2-benzyloxy-3-oxo-propyl ester
TRIMETHYLAMINE
Potassium hydroxide
ethyl 1-phenyl-3-[3,3,3-trifluoro-2-(phenylhydrazono)propyl]-1H-pyrazole-5-carboxylate
N-[N-(tert-butoxycarbonyl)-2-(2-hydroxyethyl)-L-prolyl]-D-leucine benzyl ester
(2S,3R,6S,7S,8R,9R,10R,13S,15R)-15-tert-butyloxycarbonylamino-3,6:10,13-diepoxy-8-o-fluorobenzoyloxy-2,9-dimethyloctadecanoic acid
2-amino-7-phenyl-4-pteridinol
2,4-Di-tert-butoxypyriMidine-5-carbaldehyde