**Recent Developments in a Radio-labeling of Brassinosteroids**

Aleš Marek

Additional information is available at the end of the chapter

http://dx.doi.org/10.5772/intechopen.68584

#### **Abstract**

The chapter provides a comprehensive overview on methodologies used for radio-labeling of brassinosteroids as one of the newest class of phytohormones. Discussed labeling strategies are lined up in terms of reached specific activities (SA) of brassinosteroids (BRs) as a key parameter for further utilization of such labeled drugs. The chapter is focused on two key natural radio-isotopes (tritium and carbon-14) used for drug tracing in pharmaceutical research.

**Keywords:** brassinosteroids, radio-isotope labeling, tritium, carbon-14
