{(8R)-8-[[(2S)-2-(4-fluorophenyl)propanoyl](methyl)amino]-6,7,8,9-tetrahydropyrido[3,2-b]indolizin-5-yl}acetic acid 、 {(8R)-8-[[2-(4-fluorophenyl)-3-methylbutanoyl](methyl)amino]-6,7,8,9-tetrahydropyrido[3,2-b]indolizin-5-yl}acetic acid 、 {(8R)-8-[(diphenylacetyl)(methyl)amino]-6,7,8,9-tetrahydropyrido[3,2-b]indolizin-5-yl}acetic acid 、
{(8R)-8-[[2-(4-fluorophenyl)-2-methylpropanoyl](methyl)amino]-6,7,8,9-tetrahydropyrido[3,2-b]indolizin-5-yl}acetic acid 、
{(8R)-8-[{[4-(4-fluorophenyl)tetrahydro-2H-pyran-4-yl]carbonyl}(methyl)amino]-6,7,8,9-tetrahydropyrido[3,2-b]indolizin-5-yl}acetic acid 、 {(8R)-8-[{[1-(4-fluorophenyl)-2,2-dimethylcyclopropyl]carbonyl}(methyl)amino]-6,7,8,9-tetrahydropyrido[3,2-b]indolizin-5-yl}acetic acid 、
{(8R)-8-[{[1-(4-fluorophenyl)cyclobutyl]carbonyl}(methyl)amino]-6,7,8,9-tetrahydropyrido[3,2-b]indolizin-5-yl}acetic acid 、
{(8R)-8-[{[1-(4-fluorophenyl)cyclopentyl]carbonyl}(methyl)amino]-6,7,8,9-tetrahydropyrido[3,2-b]indolizin-5-yl}acetic acid 生成
2-[(8R)-8-[[(2R)-2-(4-fluorophenyl)propanoyl]methylamino]-6,7,8,9-tetrahydropyrido[3,2-b]indolizin-5-yl]acetic acid