tert-butyl 8-amino-5,5-dioxo-5λ⁶-thia-2-azaspiro[3.4]octane-2-carboxylate

tert-butyl 4-oxo-1,3-dihydroisoquinoline-2-carboxylate

2-Methyl-2-propanyl 1-thia-6-azaspiro[3.3]heptane-6-carboxylate

3-(氰基亚甲基)氮杂丁烷-1-羧酸叔丁酯

1-噁-6-氮杂螺[3.3]庚烷-6-羧酸叔丁酯