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(2016/03/04)acetic acid 3S-{5R-(3'-{4S-acetoxy-1-[2S-(2S-methylaminopropionylamino)butyryl]pyrrolidin-2R-ylmethyl}-6,6'-difluoro-1H,1'H-[2,2']biindol-3-ylmethyl)-1-[2S-(2S-methylaminopropionylamino)butyryl]pyrrolidin}-3-yl ester
(2S,4R)-4-(tert-butyldimethylsilyloxy)-2-(6-fluoro-1H-indole-3-carbonyl)pyrrolidine-1-carboxylic acid benzyl ester
(2S,4R)-2-(6-fluoro-1H-indol-3-carbonyl)-4-hydroxypyrrolidine-1-carboxylic acid benzyl ester
[2S-(6-fluoro-1H-indole-3-carbonyl)-4S-(4'-nitrobenzoyloxy)pyrrolidin-1-yl]carboxylic acid benzyl ester
[2S-(6-fluoro-1H-indole-3-carbonyl)-4S-hydroxypyrrolidin-1-yl]carboxylic acid benzyl ester