Strontium, radioactive

Formula :

Unstable isotopes of strontium that decay or disintegrate spontaneously emitting radiation. Sr 80-83, 85, and 89-95 are radioactive strontium isotopes.

Strophanthidin 3, 5-bis-p-benzoyl benzoate

Formula :
CAS : 55601-19-9 

Photoactivatible analog of strophanthidin tested as affinity label.