P301+P310：IF SWALLOWED: Immediately call a POISON CENTER or doctor/physician.
Description
Spirocyclic building block was first synthesized by Carreira and coworkers, which provides a new area of chemical space with straightforward functional handles for further diversification.
![tert-Butyl-8-hydroxy-5-oxa-2-azaspiro[3.4]octane-2-carboxylate 95%](https://www.chemicalbook.com/CAS/20180703/GIF/1453315-99-5.gif)
