7-(S)-amino-5-[1(R)-phenylethyl]-5-azaspiro[2.4]heptane

7-(S)-amino-5-[1(R)-phenylethyl]-4-oxo-5-azaspiro[2.4]heptane

7(S)-((tert-butoxycarbonyl)amino)-5-(1(R)-phenylethyl)-5-azaspiro(2.4)heptane

(7S)-5-氮杂螺[2.4]庚烷-7-基氨基甲酸叔丁酯

8-氯-6,7-二氟-1-[(1r,2s)-2-氟环丙基]-1,4-二氢-4-氧代-3-喹啉羧酸