Table 1.

Inhibition %, IC₅₀ values and Equivalents of the Compounds (1-11) against AChE, BChE, Urease and Tyrosinase^a.

		Inhibition (%) b				IC 50 (µg/mL)		Equivalent (µg kojic acid or thiourea activity/ mg compound)
No	Compounds	AChE	BchE	Urease	Tyrosinase	AChE	BChE	Urease	Tyrosinase
1	Rosmarinic Acid	20.18±0.21	42.76±0.32	N.A.c	12.11±0.02	>100	12.76±0.12	N.A.	105.58±0.18
2	Salvigenin	22.72±0.14	43.13±0.21	N.A.	N.A.	>100	11.46±0.16	N.A.	N.A.
3	Salvianolic Acid B	10.11±0.08	49.83±0.27	45.52±0.68	N.A.	>100	10.47±0.10	192.26±0.21	N.A.
4	Salvianolic Acid A	38.82±0.12	27.49±0.08	N.A.	N.A.	23.04±0.16	48.32±0.42	N.A.	N.A
5	Tanshinone IIA	32.34±0.44	66.26±1.18	14.26±0.42	N.A.	>100	1.12±0.02	16.12±0.01	N.A.
6	Dihydrotanshinone I	64.54±0.36	87.19±0.23	N.A.	N.A.	1.50±0.02	0.50±0.01	N.A.	N.A.
7	Tanshinone I	31.29±0.72	33.01±0.86	42.41±0.85	39.82±1.16	38.12±0.62	27.67±0.04	174.73±0.19	372.86±2.47
8	Carnosic Acid	37.99±0.96	58.48±1.18	22.42±0.15	5.92±0.06	31.83±0.65	4.12±0.04	62.12±0.07	45.93±0.71
9	Carnosol	47.60±023	57.99±0.15	16.12±0.42	N.A.	11.15±0.05	3.92±0,03	26.60±0.03	N.A.
10	Cryptotanshinone	17.46±0.11	35.16±0.27	29.69±1.16	N.A.	>100	28.41±0.65	103.05±0.11	N.A.
11	Danshensu Salt	N.A.	35.37±0.13	N.A.	6.20±0.08	N.A.	24.18±0.42	N.A.	48.67±0.23
	Galanthamined	76.08 ± 0.39	67.52 ± 0.41	-	-	5.13±0.02	8.19±0.12	-	-
	Kojic acidd	-	-	-	69.07±0.38	-	-	-	-
	Thiouread	-	-	75.14±1.34	-	-	-	-	-

^aValues expressed are means ± S.D. of three parallel measurements and values were calculated according to negative control. were significantly different (p < 0.05)

^b10µg/mL

^cNot active

^dStandart compounds