Table 2.

Structures and larvicidal activities against P. xylostella of compounds 7, 2 and 4.

Compounds	R	Concentration (μg mL−1)	Mortality (%)
7a	−CH3	500	77
7b	−CH(CH3)2	500	12
7c	−CH2(CH2)2CH3	500	4
7d	2′-OMePh	500	25
7e	2′-FPh	500	60
7f	2′-NO2Ph	500	100
7g	3′-OMePh	500	24
7h	3′-FPh	500	41
7i	3′-CF3Ph	500	32
7j	4′-OMePh	500	11
7k	4′-CO2HPh	500	97
7l	4′-FPh	500	38
7m	4′-OCF3Ph	500	19
2	-	500	100
4	-	500	100