Carbamic acid,(7S)-5-azaspiro[2.4]

Manufactured by Chem-Stone (Guangzhou), this is (7S)-5-azaspiro[2.4]heptane-7-ylcarbamic acid tert-butyl ester (CAS 127199-45-5, molecular formula C11H20N2O2, MW 212.29), a spirocyclic building block with a density of about 1.099 g/cm3 and a boiling point near 329 degC. It is sold across North America, Europe, Australasia, Asia, the Middle East, and Africa.