757239-75-1
tert-butyl 1-oxa-8-azaspiro[4.5]dec-3-ene-8-carboxylate
→
~49%
240401-09-6
N-叔丁氧羰基-1-氧杂-8-氮杂螺[4.5]癸烷-3-醇
203662-51-5
4-羟基-4-(2-丙烯基)哌啶-1-羧酸叔丁酯
~35%
954236-44-3
3-氧代-1-氧杂-8-氮杂螺[4.5]癸烷-8-甲酸叔丁酯
240401-08-5