9-Acetyl-6,7α,9α,11-tetrahydroxy-12-oxoxantho<2,3-g>tetralin 、
1-chloro-2,3,6-trideoxy-4-O-(p-nitrobenzoyl)-3-(trifluoroacetamido)-α-L-lyxo-hexopyranose 在
3 A molecular sieve 、
magnesium dicyanide 、 magnesium bromide 作用下,
生成 4-Nitro-benzoic acid (2S,3S,4S)-6-((7S,9S)-9-acetyl-6,9,11-trihydroxy-12-oxo-7,9,10,12-tetrahydro-8H-benzo[b]xanthen-7-yloxy)-2-methyl-4-(2,2,2-trifluoro-acetylamino)-tetrahydro-pyran-3-yl ester