4-氧代哌啶酮盐酸盐

1,3-丙二醇

Benzyl 1,5-dioxa-9-azaspiro[5.5]undecane-9-carboxylate

N-乙酰基-4-哌啶酮

1-(1,5-dioxa-9-azaspiro-[5.5]uncan-9-yl)ethan-1-one