6-[(5S,9R)-9-(4-cyanophenyl)-3-(3,5-dichlorophenyl)-1-methyl-2,4-dioxo-1,3,7-triazaspiro[4.4]nonan-7-yl]-4-methylpyridine-3-carboxylic acid;2,2,2-trifluoroacetic acid 在
CUBCX
1-HL (benzenesulfonic acid) ion exchange cartridge 作用下,
以
甲醇 为溶剂,
以0.02 g的产率得到6-((5S,9R)-9-(4-cyanophenyl)-3-(3,5-dichlorophenyl)-1-methyl-2,4-dioxo-1,3,7-triazaspiro[4.4]nonan-7-yl)-4-methylnicotinic acid