2-(6-hydroxy-3-oxo-3H-xanthen-9-yl)-5-{[({(2S)-1-[(1'-methyl-2'-oxo-1',2'-dihydrospiro[1,3-dioxane-2,3'-indol]-5'-yl)sulfonyl]pyrrolidin-2-yl}methyl)amino]carbonyl}benzoic acid 以
甲烷磺酸 为溶剂,
以22 mg (76%)的产率得到2-(6-Hydroxy-3-oxo-3H-xanthen-9-yl)-5-{[({(2S)-1-[(1-methyl-2,3-dioxo-2,3-dihydro-1H-indol-5-yl)sulfonyl]pyrrolidin-2-yl}methyl)amino]carbonyl}benzoic acid