Table 2. SDH enzymatic inhibition of compounds 4a–4f.

Compound	Inhibition (%)
	8 µM	2 µM	1 µM	0.5 µM
4a	10.68	6.02	6.41	5.05
4b	54.95	50.10	39.42	21.75
4c	38.06	25.63	25.44	12.62
4d	45.44	33.59	25.05	16.70
4e	53.59	40.00	33.01	22.33
4f	48.93	21.94	14.37	8.16
Boscalid	80.97	53.59	43.30	21.55