Table 2: Recoveries of BRs spiked in the plant at 25 ng/g (n=3).

Purification Method	Castasterone	Brassinolide
DCM	59.2 ± 4.1	80.4 ± 10.3
DCM+C18	42.9 ± 9.4	60.4 ± 3.6
ethyl acetate	25.4 ± 2.0	58.8 ± 5.1
ethyl acetate+C18	9.7 ± 2.7	43.3 ± 4.3
Hex+ethyl	8.8 ± 4.1	32.6 ± 2.5