Table 6.

Sunscreen activity of various extracts of M. speciosa stem.

Compound	Concentration (μg/mL)	UVA zone (320~400 nm)	UVB zone (280~320 nm)	UVC zone (200~280 nm)
Petroleum ether extract	200	0.291 ± 0.05	0.384 ± 0.05	0.633 ± 0.06
Ethyl acetate extract	200	0.369 ± 0.03	0.632 ± 0.07	0.459 ± 0.06
Methanol extract	200	0.212 ± 0.06	0.522 ± 0.09	0.355 ± 0.10
Rutin	40	1.014 ± 0.28	0.663 ± 0.32	1.908 ± 0.61
4-Methylbenzylidene camphor	40	0.512 ± 0.19	3.350 ± 0.52	3.485 ± 0.46