(2S,3S)-3-[(1S,3S,4R)-3,4-dihydroxy-1-methoxy-2-oxopentyl]-6-[(2S,4R,5R,6R)-4-[(2S,4R,5R,6R)-4,5-dihydroxy-6-methyloxan-2-yl]oxy-5-hydroxy-6-methyloxan-2-yl]oxy-8,9-dihydroxy-2-[(2S,4R,5R,6R)-5-hydroxy-4-[(2R,4R,5S,6R)-5-hydroxy-4-[(2S,4S,5R,6R)-5-hydroxy-4-methoxy-6-methyloxan-2-yl]oxy-6-methyloxan-2-yl]oxy-6-methyloxan-2-yl]oxy-7-methyl-3,4-dihydro-2H-anthracen-1-one 、
(4-bromophenyl)diazonium chloride 以42%的产率得到