Table 4. Inhibitory effects of 70% methanolic extract of D. takeshimana from Ulleung Island and its organic solvent-soluble portions against α-glucosidase

Samples	Inhibition (%)					IC50(μg/mL)
	500 μg/mL	250 μg/mL	125 μg/mL	62.5 μg/mL	31.3 μg/mL
70% MeOH ext.	47.4±0.91)d2)	38.8±0.9d	29.3±0.5d	19.2±0.4d	7.3±0.4d	>500a
n-Hexane layer	99.9±1.6a	90.8±1.5a	80.9±1.3a	63.8±1.0a	47.7±0.7a	55.5±0.4d
EtOAc layer	64.9±0.9c	53.4±0.9c	43.4±0.8b	29.1±0.7b	12.1±0.5c	229.3±2.3b
n-BuOH layer	24.0±0.6e	19.0±0.5e	11.3±0.3e	5.8±0.2e	2.7±0.2e	>500a
H2O layer	5.2±0.5f	2.9±0.3f	1.5±0.2f	0.5±0.1f	0.1±0.03f	>500a
Acarbose3)	69.1±1.1b	56.7±1.1b	41.2±0.8c	29.3±0.7c	15.8±0.5b	193.1±2.1c

¹⁾Inhibitory effects are expressed as the mean±SD of triplicate experiments.
²⁾Different letters (a-f) within the same column indicate significant differences (p<0.05).
³⁾Acarbose was used as a positive control.