2-(8-Ethyl-2,4-dioxo-1,3-diazaspiro[4.5]decan-3-yl)acetic acid
7-(tert-Butoxycarbonyl)-2-oxa-7-azaspiro-[4.5]decane-3-carboxylic acid
2-Boc-2-azaspiro[4.5]decane-8-carboxylic acid
Spiro[2.5]octane-6-carboxylic acid
2-(1'-(tert-Butoxycarbonyl)spiro[chroman-2,4'-piperidine]-4-yl)acetic acid
2-(((9H-Fluoren-9-yl)methoxy)carbonyl)-8-(tert-butoxycarbonyl)-2,8-diazaspiro[4.5]decane-3-carboxylic acid
2-((Allyloxy)carbonyl)-8-(tert-butoxycarbonyl)-2,8-diazaspiro[4.5]decane-3-carboxylic acid
5-Oxaspiro[2.5]octane-1-carboxylic acid
Spiro[2.2]pentane-1-carboxylic acid
9-(tert-Butoxycarbonyl)-6-oxa-9-azaspiro[4.5]decane-2-carboxylic acid
1'-(tert-Butoxycarbonyl)spiro[chroman-4,4'-piperidine]-2-carboxylic acid
5,8-Dioxaspiro[3.4]octane-2-carboxylic acid
Spiro[2.3]hexane-1-carboxylic acid
6-(tert-Butoxycarbonyl)-6-azaspiro[3.4]octane-2-carboxylic acid
6-Oxaspiro[2.5]octane-1-carboxylic acid
9-(tert-Butoxycarbonyl)-1-oxa-9-azaspiro[5.5]undecane-2-carboxylic acid
1,1-Difluorospiro[2.5]octane-6-carboxylic acid
7-(tert-Butoxycarbonyl)-1-oxa-7-azaspiro[4.4]nonane-2-carboxylic acid
2-(5-Oxo-6-oxa-4-azaspiro[2.4]heptan-4-yl)acetic acid
6-Oxospiro[3.3]heptane-2-carboxylic acid
