Table 28.

Inhibition of DPPH radical by synthesized compounds

Compounds	R1	R2	R3	R4	IC50 (μM)
α-Tocopherol	H	Hydroxyl	H	H	2.3
85	Methoxy	Hydroxyl	H	H	2.49
86	Methoxy	Hydroxyl	Methoxy	H	2.85
87	Methoxy	PRO	H	H	17.89
88	Methoxy	PRO	Methoxy	H	4.08
89	H	GRO	H	H	9.8

DPPH 1,1-diphenyl-2-picrylhydrazyl