中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
—— | (2R,5R,6R,7S)-1-aza-2-(tert-butyl)-6-hydroxy-5-methoxycarbonyl-6,7-dimethyl-3-oxa-8-oxobicyclo[3.3.0]-octane | —— | C14H23NO5 | 285.34 |
Fused systems are formed preferentially, under standard conditions, but spiro systems are accessible only when the formation of the fused system is blocked and with careful optimisation of reaction conditions.