methyl 2-[(7E)-5-oxaspiro[3.4]octan-7-ylidene]acetate

rac-(2R,4R)-1-[5-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-1,2-oxazole-3-carbonyl]-2-methylpiperidine-4-carboxylic acid

rac-(2R,4R)-1-[5-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-1H-1,2,4-triazole-3-carbonyl]-2-methylpiperidine-4-carboxylic acid

1-[2-ethyl-2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)butanoyl]-2-methylpyrrolidine-3-carboxylic acid

5-[(2S)-2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)butanamido]-2-methylbenzoic acid

3-[4-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-3-methylbutanamido]cyclohexane-1-carboxylic acid

1-[4-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)pentanamido]cyclopropane-1-carboxylic acid

1-[(2S)-2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-4-methylpentanoyl]-3-methylpiperidine-4-carboxylic acid

2-{4-[5-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)pentanoyl]piperazin-1-yl}propanoic acid

2-[3-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)pentanamido]pent-4-ynoic acid

1-[2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)pent-4-ynoyl]-6-methylpiperidine-3-carboxylic acid